Title :
Frequency hopping 16-QAM LMMSE turbo equalizer with trellis coded modulation precoder
Author :
Nysaeter, Asgeir ; Otnes, Roald
Author_Institution :
Univ. Graduate Center, Unik, Kjeller, Norway
Abstract :
A frequency hopping 16-QAM LMMSE turbo equalizer with trellis coded modulation precoder is suggested used for an unknown and time-varying frequency-selective channel. The channel is tracked by linear interpolation between training sequences in the start and end of each frequency hop block. The encoders are selected for optimum low SNR performance, and the performance is measured with regard to the number of training symbols and frequency hops.
Keywords :
channel coding; equalisers; frequency hop communication; interpolation; least mean squares methods; precoding; quadrature amplitude modulation; time-varying channels; trellis coded modulation; turbo codes; frequency hopping 16-QAM LMMSE turbo equalizer; linear interpolation; time-varying frequency-selective channel; trellis coded modulation precoder; Concatenated codes; Equalizers; Error analysis; Frequency estimation; Interpolation; Intersymbol interference; Modulation coding; Quadrature amplitude modulation; Spread spectrum communication; Time varying systems;
Conference_Titel :
Wireless Communication Systems, 2005. 2nd International Symposium on
Print_ISBN :
0-7803-9206-X
DOI :
10.1109/ISWCS.2005.1547667
