IEEE Transactions on Vehicular Technology

A multiple branch predetection combining diversity receiver technique using pulse-envelope modulation of the transmitted signal is described. The receiver branches use the "STAR" scheme of multiple heterodyning of the received signal with itself to eliminate all exponential modulation components imparted by the transmission medium. Each branch can be shown to be mathematically equivalent to a simp... View full abstract»

In this paper the total bit-error probability using square-law detection of an on-off keyed carrier received through a fading medium is calculated. It is shown that the use of diversity will recover much of the performance loss caused by the fading, provided that an optimum decision threshold is used. Consideration is given to the performance obtained with a fixed optimum threshold (depending only... View full abstract»

A UHF mobile telephone system using digital modulation is described. The system uses on-off keying of an 836-MHz carrier, the code being supplied by an adaptive delta coder with a clock frequency of 50 kHz. The maximum audio baseband signal-to-noise ratio is approximately 30 dB. The mobile receiver employs space diversity in a maximal-ratio combiner. Due to the use of amplitude modulation of the c... View full abstract»

The effect of background noise on the performance of phase-trilateration urban vehicle-monitoring systems is discussed. An expression for the density function of the error as a function of such system parameters as carrier-to-noise ratio, frequency deviation, observation time, and bandwidth is derived. View full abstract»