Wireless channel equalisation

Abstract

Equalisation techniques for wireless channels, in particular for those encountered in mobile wireless communications, are examined. Equalisation is broadly defined to include reception techniques which estimate the state or response of the channel and then attempt to compensate for its effects. The paper considers equalisation techniques for fading dispersive channels which include both time and frequency selectivity. In addition, brief consideration is given to the problems of blind equalisation. techniques for dealing with fast fading channels and to the problem of joint equalisation and decoding. The paper does not attempt to provide in-depth analysis or performance risults. Rather, the interested reader is refened to the extensive lisr of references.

BER and Complexity Comparisons of the MPIC Receiver and the Linear Chip Equalizer

“…The linear chip equalizer proposed in [2][3][4][5], is an equalizer which treats the interferences between symbols and those between channels. Indeed when we equalize the channel on the chip level we try to find the transmitted chip sequence.…”

Great Expectations: The Value of Spatial Diversity in Wireless Networks

“…Joint Equalization/Decoding of Space-Time Trellis Codes: For broadband transmissions, equalization is indispensable for mitigating ISI [244]. STC makes equalization more challenging because it generates multiple correlated signals that are transmitted simultaneously at equal power.…”

Wireless bandwidth in the making

“…1 that for sufficiently high load and in the presence of Rayleigh fading, a CDMA channel may have higher spectral efficiency than a single user with the same total transmitted power. High-speed wideband signal processing is receiving increasing attention to counter timevarying intersymbol interference and Doppler [17]. In the last few years, several researchers have investigated the capabilities of receivers that perform diversity combining at several of the aforementioned dimensions simultaneously.…”