Robust DFE for limiter-discriminator based HIPERLAN receivers

Due to the nonlinear characteristics of the signal at the output of the discriminator device, conventional equalizers are not very effective even under low delay spread propagation. We show that, due to the relation of the envelope information with the frequency noise and its dependence on the transmitted data when multipath transmission occurs, the performance of a DFE scheme can be significantly improved in terms of the bit error rate and percentage of error-free transmissions (outage probability) with a minimum complexity increase by means of the joint use of the LD output and the instantaneous amplitude at the output of an envelope detector.

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