Title :
A decision-directed spread spectrum RAKE receiver for fast fading mobile channels
Author :
Povey, G.J.R. ; Grant, P.M. ; Pringle, R.D.
Author_Institution :
Dept. of Electr. Eng., Edinburgh Univ., UK
Abstract :
The operation of a decision-directed RAKE receiver is described which has the advantage of not requiring any overhead for training bits. The performance is illustrated using bit error rate (BER) graphs obtained from Monte Carlo simulations. The receiver is simulated using a fast fading (100 Hz Doppler) mobile channel at a bit rate of 4.8 kbit/s for a 900 MHz carrier. The receiver is not greatly affected by error propagation. However, the lag on the channel impulse response estimate is the major limitation on the system performance and it introduces an irreducible BER. Results are shown for the maximal ratio, equal gain, and differential phase combining schemes
Keywords :
Monte Carlo methods; error statistics; fading; land mobile radio; multipath channels; radio receivers; spread spectrum communication; time-varying channels; transient response; 4.8 kbit/s; 900 MHz; Monte Carlo simulations; bit error rate; channel impulse response estimate; decision-directed spread spectrum RAKE receiver; error propagation; fast fading mobile channels; performance; phase combining schemes; Bit error rate; Correlators; Delay effects; Diversity reception; Fading; Matched filters; Multipath channels; RAKE receivers; Spread spectrum communication; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345188
