Title :
Bandwidth-efficient modulation for improved ISI protection in high-data-rate SFH spread-spectrum communications
Author :
Noneaker, Daniel L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA
Abstract :
This paper addresses the performance of a slow-frequency-hop spread-spectrum system with Reed-Solomon coding in a channel that exhibits frequency-selective fading within each frequency slot. The transmitter employs QPSK modulation. An adaptation of the parity-bit method to QPSK for erasure insertion and errors-and-erasures decoding is investigated, and its performance is compared with that of errors-only decoding. The performance of the system is also compared with the performance of two SFH systems that employ BPSK modulation.
Keywords :
Reed-Solomon codes; decoding; equalisers; fading channels; frequency hop communication; intersymbol interference; maximum likelihood sequence estimation; military communication; mobile radio; packet radio networks; quadrature phase shift keying; spread spectrum communication; BPSK modulation; ISI protection; MLSE equalization; QPSK modulation; Reed-Solomon coding; bandwidth-efficient modulation; errors-and-erasures decoding; errors-only decoding; frequency-selective fading; high-data-rate communications; maximum-likelihood sequence estimation; mobile radio; packet radio systems; slow-frequency-hop communication; spread-spectrum communication; tactical radio systems; Binary phase shift keying; Decoding; Fading; Frequency; Intersymbol interference; Protection; Quadrature phase shift keying; Reed-Solomon codes; Spread spectrum communication; Transmitters;
Conference_Titel :
Military Communications Conference, 2001. MILCOM 2001. Communications for Network-Centric Operations: Creating the Information Force. IEEE
Print_ISBN :
0-7803-7225-5
DOI :
10.1109/MILCOM.2001.986075
