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| Number | Title | Issue Date |
| 7697914 | Radio receiver and radio receiver front-end A radio receiver front-end includes first and second RF receiver sections and an RF combining module. The first RF receiver section is coupled to receive an inbound RF signal and provide to a first representation of the inbound RF signal, wherein the inbound RF sign... | 04/13/2010 |
| 7424292 | Compound wireless mobile communication services Described are the concept, processes, and methods to combine an assortment of individually available and executable wireless mobile communication services for the purpose of achieving a desired objective(s). The activity of combining these individual services can be... | 09/09/2008 |
| 7400873 | Method and system for image rejection by using post mixer I/Q equalization The invention provides a system and method for tuning broadband signals by using post mixer I/Q equalization. An Image Rejection Mixer (IRM) is used for mixing Radio Frequency (RF) signals and rejecting image signals from the desired RF signals. The IRM includes an ... | 07/15/2008 |
| 7373130 | Simultaneous channel estimation of a carrier and an interferer Interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded ch... | 05/13/2008 |
| 7356317 | Adaptive-biased mixer A system or method for a circuit network that receives an RF signal, and where a plurality of switching transistors receive an RF signal output by the circuit network and perform mixing with a local oscillation (LO) signal received on a LO input. An active bias circ... | 04/08/2008 |
| 7346326 | Mobile communication terminal with equalizer function Disclosed is a mobile communication terminal which is provided with an equalizer function of audio equipment to adjust a timbre of transmitting/received speech sounds so as to satisfy a great number of users having various individualities and tastes simultaneously. ... | 03/18/2008 |
| 7277688 | DC offset correction for very low intermediate frequency receiver A wireless receiver includes a local oscillator, a mixer, a band pass filter, a DC offset determination module, a DC offset correction module, a subtraction module, and a down converter. The local oscillator produces a local oscillation that a mixer uses to down con... | 10/02/2007 |
| 7245938 | Wireless antenna traffic matrix A beam shaping antenna matrix for use in wireless cell towers that is manually-configured at a patch panel by a wireless operator based on selection of a desired beam size and point of direction. The traffic matrix allows a wireless operator to sculpt and resculpt t... | 07/17/2007 |
| 7228120 | Circuit and method for reducing direct current biases A method is provided for reducing a DC bias in a receiver. This method includes isolating a second circuit portion from a first circuit portion (535) and determining a second DC bias correction value for the second circuit portion that will eliminate a second... | 06/05/2007 |
| 7203473 | Radio equipment Radio equipment including a characteristic compensator for compensating for an orthogonality error of a mixer with low consumption power is disclosed. In radio equipment, an orthogonal detector converts a received real signal into a complex reception signal of an in... | 04/10/2007 |
| 7203466 | Transmitting and receiving unit A transmitting and receiving unit includes a receiving branch and a transmitting branch that are in each case constructed for conducting complex signals, with a control device that drives a switch by which either a phase-locked loop is switched through to frequency ... | 04/10/2007 |
| 7177621 | Wireless communication medium and method for operating the same A wireless communication medium includes an antenna, an analog signal processor, a digital signal processor, and a central processing unit & logic module. The antenna transmits and receives a signal to and from an external apparatus. The analog signal processor conv... | 02/13/2007 |
| 7171238 | Self-identifying antenna system An antenna system is disclosed, to be used with a radio component particularly a wireless access point or bridge. The present system includes an antenna element for transmitting and receiving signals at radio frequencies. An antenna connector is provided for establi... | 01/30/2007 |
| 7158769 | Device and method for alerting user to interference An alerting device allowing easy estimation of possible interference and useful suggestions to eliminate deteriorated communication quality due to interference is disclosed. A signal including a band used by a target radio communication system is selected from a rec... | 01/02/2007 |
| 7151917 | Apparatus and method for deriving a digital image correction factor in a receiver An apparatus and method for deriving a digital image correction factor in a receiver. In one embodiment, a receiver circuit may include an error detection circuit configured to receive a digital signal comprising in-phase (I) and quadrature (Q) components and to det... | 12/19/2006 |
| 7142835 | Apparatus and method for digital image correction in a receiver An apparatus and method for performing digital image correction in a receiver. In one embodiment, a receiver circuit may include an IQ signal source configured to provide a digital signal comprising in-phase (I) and quadrature (Q) components, such as an IQ mixer in ... | 11/28/2006 |
| 7071884 | Antenna system of a radio communication terminal An antenna system of a radio communication terminal includes: a directional antenna for transmitting and receiving an RF signal to and from a base station through a radio link; and an amplifying unit integrated on one board together with the directional antenna and ... | 07/04/2006 |
| 7062301 | Wireless control of operating characteristics of microphone-including arrangement for users of power sports equipment A communication system for use by a rider of power sports equipment having enables the rider to control the operating characteristics, such as the operating mode, of a microphone-including arrangement of a two-way radio or public address (PA) equipment while the rid... | 06/13/2006 |
| 7058384 | Radio system with universal communication interface A radio system comprises a radio having a transmit mode activated by a press to talk (PTT) switch mounted on a universal communication interface for mounting on a radio interface associated with the radio. The radio interface may or may not form part of the radio an... | 06/06/2006 |
| 7046739 | Pre-distortion of input signals to form constant envelope signal outputs A plurality of input signals are pre-distorted for combination into a first combined signal having a constant envelop. The input signals are combined into a second combined signal, and a similarity between each of the input signals and the second combined signal is ... | 05/16/2006 |
| 7046064 | Clock generation with continuous phase A clock generation system includes an oscillator and one or more clock generators. The oscillator provides inphase and quadrature oscillator signals having a fixed frequency. Each clock generator receives the oscillator signals and generates a respective output cloc... | 05/16/2006 |
| 7010275 | Radio system with cordless remote PTT module A radio system comprises a radio having a transmit mode. A press to talk (PTT) switch is located in a remote module having a transmitter that transmits a signal to a receiver associated with the radio. In response, the receiver opens a communication channel to the r... | 03/07/2006 |
| 6950635 | Vehicular communication apparatus A vehicular communication apparatus including a helmet worn by a passenger of a vehicle, the helmet having a speaker, a microphone, and a helmet side infrared transmitter/receiver connected to the speaker and the microphone. The vehicle body side or helmet side is p... | 09/27/2005 |
| 6947718 | Deviation compensation apparatus A compensating part compensates for deviations on transmission paths, and a pre-deviation signal combining part or a post-deviation signal combining part combines signals on the transmission paths before or after having the deviations applied thereto, wherein the co... | 09/20/2005 |
| 6915112 | Active cancellation tuning to reduce a wireless coupled transmit signal An active cancellation controller receives a signal strength indicator that indicates a power level of a coupled signal from a local wireless transmitter at a local wireless receiver. The active cancellation controller tunes an active cancellation circuit to reduce ... | 07/05/2005 |
| 6826392 | Multipath noise reduction method, multipath noise reducer, and FM receiver A multipath noise reducer extracts a high-frequency signal from a demodulated signal obtained from a frequency-modulated signal, and generates a noise reduction coefficient from the extracted high-frequency signal. The demodulated signal is also separated into high-... | 11/30/2004 |
| 6823180 | Method and apparatus for adapting antenna visibility in a wireless communications unit A method within and wireless communications unit (WCU) arranged to operate in a fixed wireless network including a transceiver for receiving and transmitting signals within the network; an antenna system having adjustable visibility to the fixed wireless network; an... | 11/23/2004 |
| 6813486 | RF circuit An RF circuit configured to inteface a balanced port (1, 2, 11, 12) with an unbalanced port (4, 14) by emulating the function of a balun. Reactive components (20, 30, 120, 130) in both branches of a balanced circuit form two resonant circuits by... | 11/02/2004 |
| 6658234 | Method for extending the effective dynamic range of a radio receiver system A method and apparatus for processing cochannel signals received at a sensor array in a cumulant-based signal processing and separation engine to obtain a desired set of output signals or parameters. For use in a signal recovery system, the output signals... | 12/02/2003 |
| 6516187 | DC offset correction for direct conversion tuner IC The present invention discloses a method and apparatus for correcting the DC offset caused by self-conversion of the oscillator signal in an RF-to-baseband converter. The circuit comprises: a subtractor for subtracting an amplified DC offset signal from a... | 02/04/2003 |
| 6477502 | Method and apparatus for using non-symmetric speech coders to produce non-symmetric links in a wireless communication system A method and apparatus for balancing the forward link capacity of a wireless communication system with the reverse link capacity of the system is presented. Speech coders with selectable modes are implemented in both links so that a forward link speech co... | 11/05/2002 |
| 6393260 | Method for attenuating spurious signals and receiver The invention relates to a method and radio receiver for attenuating spurious signals when receiving (6 to 12) radio signals, when radio signals are mixed (10) to a second frequency, which may be the baseband frequency, for example. Spurious signals are c... | 05/21/2002 |
| 6370205 | Method and apparatus for performing DC-offset compensation in a radio receiver In order to increase accuracy of DC-offset compensation within radio receivers and to ensure that such compensation does not erode the dynamics of the decoders located within the receivers, the present invention separately performs mean value estimation a... | 04/09/2002 |
| 6343211 | LO cancelling mixer There is described a system and a process for reducing leakage of LO (LLO) in a system which converts the frequency of a first signal by mixing the first signal with a second supplied signal to a third signal having a frequency which is different from the... | 01/29/2002 |
| 6311052 | PTT radio system A 2-way radio system for use by a driver of a vehicle such as a motorcycle, enables operation of the PTT (push-to-talk) switch to transmit voice communications, without requiring the driver to raise his/her hand to a PTT switch button on the 2-way radio a... | 10/30/2001 |
| 6198908 | System and a method for transfer of a digital information carrying signal A system and a method for transfer of a digital information carrying signal 51 between an input of a transmitter and an output of a receiver. The information carrying signal is modulated in a modulator included in the transmitter 12, and the modulated sig... | 03/06/2001 |
| 6188880 | Apparatus and method for reducing low-frequency distortion in frequency converted signals An apparatus for reducing undesirable low-frequency distortion in a direct conversion communication receiver includes a signal generator to produce a first periodic signal and a second periodic signal. A merge circuit combines an input signal and the firs... | 02/13/2001 |
| 6006081 | Communications receivers A communications receiver such as an integrated zero IF receiver comprises an input for receiving an input signal and a zero IF frequency down conversion circuit coupled said input and constructed to provide quadrature related signals (I,Q) at a substanti... | 12/21/1999 |
| 5923714 | Normalization circuit for preventing divergence of a normalizing voltage in a coupler used for diversity operation A normalization circuit for preventing divergence of the normalizing voltage of a coupler used for diversity operation in a communication system includes: a phase detector for generating a phase detection signal corresponding to first and second phase dif... | 07/13/1999 |
| 5862466 | Method and apparatus for automatically balancing a radio-frequency mixer An automatic balancing circuit for a radio frequency mixer which reduces LO-IF signal leakage, as well as minimizing second order harmonic distortion products is described. The circuit couples to in-phase and out-of-phase signal lines originating from the... | 01/19/1999 |
