No abstract

No abstract

We introduce a new kind of adaptive equalizer that operates in the spatial-frequency domain, and uses either Least Mean Square (LMS) or Recursive Least Squares (RLS) adaptive processing. We simulate the equalizer's performance in an 8 Mb/s QPSK (quaternary phase shift keying) link over a frequency-selective, Rayleigh fading multipath channel with -3ps rms delay spread, corresponding to 60 symbols of dispersion. Our results show rapid convergence and tracking for a range of mobile speeds (up to -100 mph). Moreover, a 2-branch RLS equalizer requires only -50 complex operations per detected bit, which, at 8 Mbh, is close to achievable with state-of-the-art digital signal processing technology.

No abstract

No abstract