Title :
Chip-level differential encoding/detection of spread-spectrum signals for CDMA radio transmission over fading channels
Author :
Cavallini, Alberto ; Giannetti, Filippo ; Luise, Marco ; Reggiannini, Ruggero
Author_Institution :
Dipt. di Ingegneria della Inf., Pisa Univ., Italy
fDate :
4/1/1997 12:00:00 AM
Abstract :
This paper is concerned with the design and performance evaluation of a direct-sequence spread-spectrum transmission and signal-detection technique for application to code-division multiple-access mobile radio networks. Unlike the conventional differential encoding/detection of data symbols, such a technique envisages differential encoding/detection of the spreading code chips to counteract the fast time-selective fading encountered in mobile radio transmissions. Binary PSK modulation on a Rician frequency-flat-fading channel is assumed, with Gaussian and Rayleigh channels as particular cases. The bit-error rate performance of the receiver is analytically evaluated as a function of the relevant system parameters, and the impact on the receiver performance of a carrier frequency offset is also investigated
Keywords :
Gaussian channels; Rayleigh channels; Rician channels; code division multiple access; coding errors; demodulation; encoding; error statistics; fading; land mobile radio; phase shift keying; pseudonoise codes; radio networks; radio receivers; signal detection; spread spectrum communication; CDMA radio transmission; DS-SS communication; Gaussian channels; Rayleigh channels; Rician frequency flat fading channel; binary PSK modulation; bit error rate performance; carrier frequency offset; chip-level differential encoding/detection; code division multiple access; data symbols; fast time-selective fading; mobile radio networks; mobile radio transmissions; performance evaluation; receiver performance; spread-spectrum signals; spreading code chips; system parameters; Encoding; Frequency; Land mobile radio; Multiaccess communication; Phase shift keying; Rayleigh channels; Receivers; Rician channels; Signal design; Spread spectrum communication;
Journal_Title :
Communications, IEEE Transactions on
