Title :
Multiple hops/symbol fast frequency-hopping spread spectrum multiple access with coding for indoor radio
Author :
Moeneclaey, M. ; Wang, J.
Author_Institution :
Commun. Eng. Lab., Ghent Univ., Belgium
Abstract :
The paper is concerned with the bit error rate (BER) performance of multiple hops/symbol fast-frequency-hopped spread-spectrum multiple-access (FFH-SSMA) systems operating through an indoor radio multipath Rayleigh fading channel. M-ary frequency-shift-keying (MFSK) modulation with noncoherent square-law envelope demodulation and Reed-Solomon (RS) coding is considered. Results obtained in this study show that an FFH-SSMA system is not sensitive to the changes in the number of paths. Employing RS coding with an increased number M of MFSK signals yields a significant improvement in BER performance. Assuming a given system bandwidth, using a single hop per symbol is the best solution when the multiaccess interference can be large. Using several hops per symbol is more advantageous when the multiaccess interference is small.<>
Keywords :
encoding; error correction codes; fading; frequency agility; mobile radio systems; multi-access systems; radiofrequency interference; spread spectrum communication; telecommunication channels; BER performance; FFH-SSMA; M-ary frequency-shift-keying; MFSK; Reed-Solomon coding; bit error rate; fast frequency-hopping; indoor radio; multiaccess interference; multipath Rayleigh fading channel; multiple hops/symbol; noncoherent square-law envelope demodulation; spread spectrum multiple access; system bandwidth;
Journal_Title :
Communications, Speech and Vision, IEE Proceedings I
