Quotables
"There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States."
T. Craven, FCC Commissioner ; 1961
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| Number | Title | Issue Date |
| 7372897 | Portable information communication terminal, program, and recording medium The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of t... | 05/13/2008 |
| 7352800 | Method of partial parallel interference cancellation A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one fr... | 04/01/2008 |
| 7352319 | Methods and systems utilizing Doppler prediction to enable fusing A method for controlling a detonation altitude of a radar equipped munition is described. The method includes calculating a velocity of the munition while the munition is at an altitude greater than the desired detonation altitude, determining when the munition is a... | 04/01/2008 |
| 7321612 | Bit stream conditioning circuit having adjustable PLL bandwidth A high-speed bit stream interface module interfaces a high-speed communication media to a communication Application Specific Integrated Circuit (ASIC) via a Printed Circuit Board (PCB). The high-speed bit stream interface includes a line side interface, a board side... | 01/22/2008 |
| 7317769 | Bit stream conditioning circuit having adjustable input sensitivity A high-speed bit stream interface module interfaces a high-speed communication media to a communication Application Specific Integrated Circuit (ASIC) via a Printed Circuit Board (PCB). The high-speed bit stream interface includes a line side interface, a board side... | 01/08/2008 |
| 7212152 | Monopulse radar system The present invention provides that a monopulse radar system to correct an amplitude error and a phase error developed between receiving channels and improve the accuracy of a detected angle. A part of a transmit signal is supplied to respective channels on the rece... | 05/01/2007 |
| 7190305 | Radar apparatus In a radar apparatus, a receiving antenna includes a plurality of antenna elements, each receiving, as a reception signal, radio waves emitted into space and reflected off a target object. An analog signal is obtained by downconverting and putting a bandwidth constr... | 03/13/2007 |
| 7162200 | Antenna calibration system and method An antenna calibration system consists mainly of a signal source, an antenna, a first radio frequency mixer, a first local oscillator, an power detecting device, a personal computer, and a servo amplifier. The signal source emits a signal, and the antenna receives t... | 01/09/2007 |
| 7109902 | Method and system for sampling a signal According to one embodiment of the invention, a method of sampling a signal is provided. The method includes receiving over a signal path an analog signal generated using a first clock signal by a first device. The method also includes sampling the analog signal usi... | 09/19/2006 |
| 5982320 | Radar seeker A radar seeker employing a 4-element antenna and amplitude or phase comparison target location. The azimuth (C and D) and elevation (A and B) elements share two channels alternately by means of cycling switches (S1, S2). Sum (31) and difference (29) signa... | 11/09/1999 |
| 5717405 | Four-port phase and amplitude equalizer for feed enhancement of wideband antenna arrays with low sum and difference sidelobes A four-port transmission line device that processes two incoming RF signals of arbitrary phase and amplitude to output two corresponding RF signals of equal phase and amplitude. Two sets each of two quarter-wave transmission line segments are connected in... | 02/10/1998 |
| 5691729 | Aperture-to-receiver gain equalization in multi-beam receiving systems Where two or more antenna beams may receive signals from the same cellular communication system user, post-reception beam channel gain variations may obscure choice of the channel providing the strongest user signal. Thermal atmospheric noise, assumed to ... | 11/25/1997 |
| 5369411 | Imbalance correction of in-phase and quadrature phase return signals A method of correcting phase and amplitude imbalances of I and Q components using digital correction coefficients. The amplitude Gc and phase coefficient Pc obtained solely in the time domain from a pilot signal. The I and Q components of the pilot signal... | 11/29/1994 |
| 5315304 | Digital monopulse A digitally formed monopulse radar employing dynamic real-time calibration uring operation. The invention has a transmitter section, timing circuit, RF section, IF section, in-phase and quadrature section and a digital signal processor. A portion of the tr... | 05/24/1994 |
| 5241316 | Use of iteration to improve the correction of AGC dependent channel-to-channel gain imbalance A method and apparatus that uses iteration to achieve a better prediction of the values of the commands needed to balance the gains of Σ+Ɗ and Σ-Ɗ channels of a radar guidance system, when an imbalance occurs due to a change caused by the AGC circuitr... | 08/31/1993 |
| 5070336 | Radar guidance system correcting hardware induced channel-to-channel phase errors A phase dependent radar guidance system, the receiver (18) of which separates returns into a channel (22) where returns are summed (S) and a further channel (24) where the returns are differenced (jD). The S and jD signals are combined (26) and formed int... | 12/03/1991 |
| 5051752 | Angle measurement compensation technique for amplitude comparison monopulse receiver A compensated amplitude comparison monopulse receiver (10) having an angular measurement capability substantially unaffected by mismatches in channel transient response and target range tracking inaccuracy is disclosed herein. The inventive monopulse rece... | 09/24/1991 |
| 4994810 | Monopulse processor digital correction circuit A method and correction circuit is described incorporating a monopulse receiver, injecting a first signal of known amplitude and arbitrary phase and a second signal of the same amplitude shifted 90° and measuring the output voltages of the channel and us... | 02/19/1991 |
| 4905010 | Method for balancing channels in a multichannel pulse radar system and a radar system using this method Radar systems that operate in accordance with the crossfeed method require an exact balancing of the individual Doppler frequency evaluation channels in the receiver. According to the invention, a special method is used first to make the amplitude levels ... | 02/27/1990 |
| 4866449 | Multichannel alignment system A multichannel processor for signals modulated onto a common IF frequency includes first and second analog-to-digital converters (ADC) for first and second channels, respectively. Each ADC receives a 4XIF frequency clock for producing digital samples, whi... | 09/12/1989 |
| 4788547 | Static-split tracking radar systems A static-split tracking radar system with substantially improved performance. The system includes parallel signal processing channels for processing sum and difference signals from a target-seeking aerial array, to produce target tracking signals. Novel m... | 11/29/1988 |
| 4719465 | Monopulse radar equipment A monopulse radar equipment is developed which comprises first and second radiators arranged in symmetrical positions with respect to the boresight axis to radiate radar pulses in a predetermined cycle and thus to produce first and second directional radi... | 01/12/1988 |
| 4656480 | Monopulse FM-CW radar system with improved axis stability The radar comprises in known manner a transmitter (1), a transmitting antenna (E1), two receiving antennas (R1,R2), mixers (6,7) and means for processing the subtractive beat signals supplied by the mixers for effecting de... | 04/07/1987 |
| 4646093 | Digital monopulse for tracking radar An improved monopulse radar system wherein target return signals received by a plurality of antenna elements are corrected with correction signals derived within the system in response to pilot pulses. The improvement comprises a plurality of receiver cha... | 02/24/1987 |
| 4394659 | Monopulse radar with pilot signal generator A monopulse radar comprising a pilot signal generator (20) for injecting phase and amplitude-defined pilot signals into the separate receiving channels (6-12, 3, 16-19) to obtain correction signals through the variation in the mutual phase and amplitude r... | 07/19/1983 |
| 4368468 | Monopulse radio receiver compensation apparatus In a monopulse radar receiver especially having off-boresite processing for a multiple target capability, there is included apparatus for compensating the receiver derived centroid and extent related signals for post hybrid interchannel imbalances in acco... | 01/11/1983 |
| 4348676 | Automatic phase alignment system for a tracking antenna The tracking signals of a monopulse satellite tracking system are optimized by aligning the phases of the azimuth and elevation channels (the "difference" channels) with the reference (or "sum") channel using an autophase controller and a simulated far fi... | 09/07/1982 |
| 4044318 | Ganged radio frequency filter A three channel electronically tunable filter arrangement for selecting radio frequency signals to be processed in a monopulse receiver is disclosed. Each channel of the disclosed filter arrangement includes an yttrium-iron-garnet (YIG) filter disposed in... | 08/23/1977 |
