Title :
Maximum-likelihood diversity combining in partial-band noise
Author :
Li, Gang ; Wang, Qiang ; Bhargava, Vijay K. ; Mason, Lloyd J.
Author_Institution :
Lucent Technol. Inc., AT&T Bell Labs., Whippany, NJ, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
Maximum-likelihood diversity combining is investigated for an FFH/MFSK spread spectrum system in partial-band noise (PBN). The structure of maximum-likelihood diversity reception in PBN plus white Gaussian noise is derived. It is shown that signal-to-noise ratio and the noise variance at each hop have to be known to implement this optimum diversity combiner. Several suboptimum diversity combining schemes are also considered. The performance of the optimum combining scheme is evaluated. It is shown that adaptive gain control diversity combining actually achieves the optimum performance when interference is not very weak
Keywords :
AWGN; adaptive control; diversity reception; frequency hop communication; frequency shift keying; gain control; maximum likelihood detection; radiofrequency interference; spread spectrum communication; telecommunication control; AWGN; FFH/MFSK spread spectrum system; SNR; adaptive gain control; diversity reception; interference; maximum-likelihood diversity combining; noise variance; optimum diversity combiner; optimum performance; partial-band noise; performance; signal-to-noise ratio; white Gaussian noise; AWGN; Additive white noise; Background noise; Diversity reception; Frequency diversity; Frequency shift keying; Gaussian noise; Interference; Signal to noise ratio; Spread spectrum communication;
Journal_Title :
Communications, IEEE Transactions on
