Abstract: A system for measuring the pseudo range from a first GPS sensor to a designated navigational satellite, for use in a satellite positioning system (SPS) is comprised of first and second GPS sensors for receiving and recording first and second portions of the signal transmitted by the designated navigational satellite, the recordings referred to as the first and second datagrams; and means for transmitting the first and second datagrams to a datagram processing facility wherein the pseudo range from the first GPS sensor to the designated navigational satellite is extracted.

Abstract: A technique for processing received signals in multiple-antenna systems. Received signals from the different antennas may be amplified by a Low Noise Amplifier (LNA) and time-multiplexed by a switch to form a single analog signal. The time-multiplexed analog signal is down-converted and processed using a single RF chain for each signal component. This may result in an N-fold decrease in hardware in multiple antenna receiver systems.

Abstract: A system for reducing peaks comprises a processor and a memory. The processor is configured to determine a phase offset for each of a plurality of input signals. The phase offset for each of the plurality of input signals are determined using one or more trials of phase offsets to determine a selected set of phase offsets. The processor is further configured to modulate the plurality of input data signals using the selected set of phase offsets to produce a plurality of modulated phase offset data signals and to generate a sum of the plurality of modulated phase offset data signals, wherein the sum has a lower peak value during a trial of the one or more trials of phase offsets as compared to the sum during another trial not using the selected set of phase offset signals. The memory is coupled to the processor and configured to provide the processor with instructions.

Abstract: A technique weights noise power used in a demodulation/demapping process using on an estimate of interference and its associated power. Using this technique the effect of partial interference can be ameliorated. For example, a value, ?2, can be used to represent the estimated noise and interference power, and ?2 can be used to modify a received signal to ameliorate the effects of noise and interference. ?2 can be adjusted in response to partial interference, and can be represented by the formula: ?2=?N2+q ?I2, where ?N2 is “noise power,” ?I2 is “interference power,” and q is an interference correction factor.

Abstract: A technique for PAR reduction involves producing an optimized clipping pulse. The optimized clipping pulse may be designed to meet certain requirements, such as a spectral mask target or an EVM target, when applied to a signal.

Abstract: A technique for low-complexity high-performance coherent demodulation of GFSK signals involves utilizing a novel phase and frequency tracking mechanism coupled with a trellis search technique to track signal memory in the demodulation process. A method according to the technique may include modeling modulation based upon a trellis. The method may further include estimating unknown parameters, selecting a maximum likelihood path through the trellis, and mapping the maximum likelihood path to an output bit sequence. The technique is also applicable to DSPK and other applicable known or convenient protocols.