Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5151919 | CDMA subtractive demodulation Substractive CDMA demodulation optimally decodes a coded information signal embedded in may other overlapping signals making up a received, composite signal. A radio receiver correlates a unique code corresponding to the desired signal to be decoded with ... | 09/29/1992 |
| 5136612 | Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system A CDMA system embodying apparatus and methods operates to reduce the effects of the multiple access interference in order to increase the channel capacity and achieve greater efficiency in the use of a given frequency bandwidth. Reception of CDMA radio tr... | 08/04/1992 |
| 5109390 | Diversity receiver in a CDMA cellular telephone system A spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the loc... | 04/28/1992 |
| 5107487 | Power control of a direct sequence CDMA radio The power control apparatus of the present invention is comprised of a local oscillator signal path coupled to a mixer (106) through a variable attenuator (107) and an IF signal path coupled to the mixer (106) through two variable attenuators (108 and 109... | 04/21/1992 |
| 5105435 | Method and apparatus for cancelling spread-spectrum noise A spread-spectrum noise canceller is provided for cancelling user code noise from a spread-spectrum communication channel. The spread-spectrum noise canceller including a receiver for receiving a spread-spectrum signal including a first and at least a sec... | 04/14/1992 |
| 5103459 | System and method for generating signal waveforms in a CDMA cellular telephone system A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and b... | 04/07/1992 |
| 5099493 | Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals Disclosed is a multiple-signal receiver system for direct sequence, code division multiple access (CDMA), spread spectrum (SS) signals. The receiver is structured to overcome inter-signal interference during signal acquisition and data reception even when... | 03/24/1992 |
| 5084900 | Spread spectrum system with random code retransmission A communication system includes a hub station and a plurality of terminal stations. An inbound satellite communication link from each of the terminal stations to the hub station sends digital data packets encoded with a CDMA code for code division multipl... | 01/28/1992 |
| 5056109 | Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control... | 10/08/1991 |
| 5046066 | Wireless local area network A local area network permits wireless transfer of digitized data among data processing machines in the interior of a building. The network includes a base station which may commonly be associated with shared network resources such as a host computer, prin... | 09/03/1991 |
| 5031173 | Decoder for added asynchronous bit sequences A composite signal is formed by simultaneously transmitting multiple asynchronous data bit sequences, that are coded with respective spreading codes, in a single channel; and a circuit is provided which decodes any bit b(x) in that composite signal. This ... | 07/09/1991 |
| 5022046 | Narrowband/wideband packet data communication system The best features of narrowband and wideband signaling are merged to provide a simple and reliable multiple-access network. This is done by transmitting the header of the packet using narrowband signaling coupled with an associated channel access protocol... | 06/04/1991 |
| 4962507 | Feed forward spread spectrum signal processor A communications receiver for a code division multiple access (CDMA) satellite communication system in which a plurality of data carriers share the same band. A pilot carrier transmits a timing reference used by all receivers to acquire the clock used in ... | 10/09/1990 |
| 4930140 | Code division multiplex system using selectable length spreading code sequences A code division multiplex system for use in a spread spectrum communication system utilizes selectable length spread spectrum spreading code sequences. At the encoder, one of a pluraluty of a spread spectrum spreading code sequences having a given fixed l... | 05/29/1990 |
| 4882579 | Code division multiplexed acknowledge back paging system An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to an group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicat... | 11/21/1989 |
| 4841527 | Stabilization of random access packet CDMA networks A CDMA network includes a retransmission scheduler which selectively delays the retransmission of an initially erroneously sent signal. The selected delays have an average value in a range of values which results in a single equilibrium point between inpu... | 06/20/1989 |
| 4755983 | Dedicated message matched filter In order to recover the original audio modulation samples when using a continuous code change, sampled data, spread spectrum waveform structure, a dedicated message matched filter is used to process data from multiple emitters within the same range interv... | 07/05/1988 |
| 4672658 | Spread spectrum wireless PBX The present invention relates to a wireless PBX network wherein direct sequence spread spectrum multiple access is used for voice and data communications to support a plurality of local-local and local-external calls. The present wireless PBX arrangement ... | 06/09/1987 |
| 4644560 | Intranetwork code division multiple access communication system A CDMA format is used within a network to permit communication between members of a network. Network members are synchronized to each other and are each aware of a predetermined set of code words which has been established. A member desiring to transmit d... | 02/17/1987 |
| 4597087 | Frequency hopping data communication system The frequency hopping data communications system comprises a first circuit arrangement to produce identical first and second pseudo-noise code streams time displaced with respect to each other, each of the first and second code streams producing a frequen... | 06/24/1986 |
| 4538281 | Adaptive acquisition of multiple access codes An adaptive acquisition technique is disclosed for enabling the initial acquisition of a received coded signal in a direct sequence spread spectrum system using multiple access codes for code division multiplexing. In order to obtain code synchronization ... | 08/27/1985 |
| 4494228 | Orthogonal code division multiple access communications systems An orthogonal code division multiple-access communications system comprised of a plurality of transceivers respectively employing orthogonal noise code mate pairs of a type having autocorrelation functions upon detection which when linearly added together... | 01/15/1985 |
| 4475215 | Pulse interference cancelling system for spread spectrum signals utilizing active coherent detection A pulse interference cancelling system for spread spectrum signals utilized in a digital noise coded communications system. The system includes a first and second noise coded signal channel located in a noise coded signal receiver which also includes a de... | 10/02/1984 |
| 4475214 | CW Interference cancelling sytem for spread spectrum signals utilizing active coherent detection A noise coded communications system which eliminates continuous wave (CW) interference while providing no loss or degradation of the desired signal includes the variable delay line and a linear adder coupled to the output of the front end section of a mul... | 10/02/1984 |
| 4470138 | Non-orthogonal mobile subscriber multiple access system An adaptive interference cancelling system for multibit spread spectrum noise codes wherein a plurality of users in a mobile subscriber access system each operates with a different noise code. Each user receives a composite signal which includes a desired... | 09/04/1984 |
| 4365327 | Method of and means for spread-spectrum transmission An analog signal sent from one telephone subscriber to another is periodically sampled at a transmitting terminal and each sample is held for a storage period equal to a sampling interval as well as to a basic pulse period of a random or pseudorandom sequ... | 12/21/1982 |
| 4358844 | Method of and means for spread-spectrum transmission An analog signal sent from one telephone subscriber to another is differentiated at a transmitting terminal and the resulting derivative is distorted by mixing with a random or pseudorandom sequence of bipolar binary pulses before being conveyed, e.g. by ... | 11/09/1982 |
| 4320513 | Electric circuit for the production of a number of different codes An electric circuit, in particular for devices and systems operating on an SSMA basis, for the production of a number of different codes according to a linear law of formation and having practically negligible values of cross correlation coefficients and ... | 03/16/1982 |
| 4301530 | Orthogonal spread spectrum time division multiple accessing mobile subscriber access system A time division multiple access mobile communications system employing frency division multiplexing and perfect noise codes to enable utilization of the system. A central node, or repeater, is employed, with all transmissions to it being performed at a f... | 11/17/1981 |
| 4164628 | Processor for multiple, continuous, spread spectrum signals This relates to a signal processor which accepts the linear sum of several continuous (CW) direct sequence, spread spectrum signals, and outputs a sequence of narrow pulses, each of which contains all the available energy of one of the input signals. The ... | 08/14/1979 |
| 4071826 | Clipped speech channel coded communication system 9. A clipped speech channel coded communication receiver comprising: input eans for receiving radiated energy containing trains of pulses therein; channel decoder means operatively connected to said input means and comprising means for receiving said train... | 01/31/1978 |
