Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 5546097 | Shaped dual reflector antenna system for generating a plurality of beam coverages A dual-reflector antenna system (40) is provided for generating a shaped main beam radiation pattern (20) and at least one additional secondary spot beam radiation pattern (30,32). The antenna system (40) includes a main shaped reflector (10) having a sha... | 08/13/1996 |
| 5413293 | Magnetic torque attitude control systems A magnetic torquing system for a spacecraft using conducting coils is disclosed. In one embodiment, the conductors (44, 46) on a spacecraft's (10) solar wing (28, 30) which connect the solar cell strings (38) to the voltage controller (48) are wired to pr... | 05/09/1995 |
| 5411227 | Satellite thruster uncertainty estimation in transition mode The estimation and compensation of fixed, but unknown uncertainties of a thruster (22) for improving satellite attitude estimation and control as well as eliminating the need for nutation damping devices is disclosed. A thruster (22) is fired and an attit... | 05/02/1995 |
| 5402137 | Equalized shaped reflector antenna system and technique for equalizing same Equalized offset fed east and west shaped reflectors (12) and (14) and technique for producing the same are provided herein. A first shaped reflector (12) has a first shaped reflective surface (3) formed to provide a first shaped beam radiation pattern (2... | 03/28/1995 |
| 5377225 | Multiple-access noise rejection filter for a DS-CDMA system A direct-sequence multiple-access code division (DS-CDMA) communication system accommodates a multiplicity of separate transmitters (12) and at least one base-station receiver (14). Each transmitter generates a transmitted signal (16) at a common carrier ... | 12/27/1994 |
| 5369671 | System and method for decoding tail-biting code especially applicable to digital cellular base stations and mobile units A digital cellular system (10) employs a decoder that decodes control messages encoded by a convolutional tail-biting encoding procedure. The control messages (57) contain 65 bits that are encoded in a 260 bit data frame (59). The decoder reads (112) the ... | 11/29/1994 |
| 5367559 | Sequential power estimation for cellular system handoff Cellular handoff is improved by tailing or adapting the measurement time based on the characteristics of the received signal intensity or power. More particularly, base stations typically measure mobile signal power in order to determine the necessity for... | 11/22/1994 |
| 5365571 | Cellular system having frequency plan and cell layout with reduced co-channel interference A cellular radio-telephone system has a plurality of cells each of which has S sectors. The cells are grouped into a plurality of clusters each of which has N adjoining cells. Each cell has a set of assigned system frequencies with respective frequency su... | 11/15/1994 |
| 5363311 | Data compression system using response waveform discrimination A waveform classification system uses a detector 10 for detecting an analog input x(t), as well as sampler 14 and quantizer 16 to convert this analog input into a series of digital values {Jk-1, Jk, Jk+1 }. This series of ... | 11/08/1994 |
| 5361046 | Modulator having fractional sample/symbol time A modulator capable of providing a fractional sample or symbol 995486 time employs a decimation counter (23) responsive to a clock having a frequency equal to M/N×(data symbol clock), where M is an interpolation factor and N is a decimation factor, for g... | 11/01/1994 |
| 5357513 | Transmission power level adjustment in radio telephony A mobile telephone system multiplexes plural voice traffic channels on a single carrier using a TDMA protocol. The capacity of the mobile telephone system is increased by assigning voice traffic capacity, not on a conversation basis, but on a speech spurt... | 10/18/1994 |
| 5343513 | Channel compression and dynamic repartitioning for dual mode cellular radio A cellular system uses dynamic repartitioning and channel packing to improve capacity without impacting quality. Dynamic repartitioning is employed to convert a carrier which operates, at one time, as an analog carrier to operate, at a later time, as a di... | 08/30/1994 |
| 5321818 | System for arbitrating for access on VME bus structures System for providing self-selection arbitration among a plurality of slave processors connected to a VME back plane. The slave processors are connected to a common ID bus, interrupt line, and acknowledge bus. Slave processors contend for access to the VME... | 06/14/1994 |
| 5319677 | Diversity combiner with MLSE for digital cellular radio A diversity combiner for use with the maximum likelihood sequence estimator is disclosed. First and second receive channels produce demodulated replicas Z1 (k) and Z2 (k) of the transmitted symbol data I(k). The two signals are proce... | 06/07/1994 |
| 5315589 | TDMA synchronization using visibility designation TDMA timing is maintained by the use of visibility information transmitted among the stations in a conference. Each station monitors the identity of stations from which bursts are received. A station also receives visibility information from other station... | 05/24/1994 |
| 5313495 | Demodulator for symbols transmitted over a cellular channel A lower order Viterbi system for estimating symbols being transmitted over a digital cellular channel. The received signal is oversampled at a rate at least twice the frequency of the symbol duration. The energy contained in the main and interference symb... | 05/17/1994 |
| 5311545 | Modem for fading digital channels affected by multipath A receiver designed for use in a mobile environment, which includes an adaptive equalizer driven by phase estimation and rotation circuitry, and which is operable in multipath fading channels. The present invention uses an AFC loop and a phase rotation ci... | 05/10/1994 |
| 5307460 | Method and apparatus for determining the excitation signal in VSELP coders A new basis vector search process that directly results in an optimal linear weighting for a VSELP (Vector Sum Excited Linear Prediction) coder, thus avoiding the need to perform an extensive search. In the present invention, the conventional search proce... | 04/26/1994 |
| 5304944 | High frequency linearizer A linearizer particularly valuable for millimeter wave satellite communications is disclosed. A satellite (12) divides signal into linear (20) and nonlinear (32) paths which are converted to finline. A pair of beamlead PIN diodes (48) and a pair of varact... | 04/19/1994 |
| 5304863 | Transformer driver having unlimited duty cycle capability by inserting narrow pulses during unlimited duty cycles A transformer driver having an unlimited duty cycle capability is disclosed herein. The transformer driver 10 of the present invention is coupled to an output circuit 20 and includes a transformer 32 having primary winding and secondary windings 30 and 34... | 04/19/1994 |
