Adaptive Transversal Equalization of Multipath Propagation for 16-QAM, 90-Mb/s Digital Radio

Fenderson, G. L.; Parker, J.W.; Quigley, P. D.; Shepard, Scott; Siller, C.

doi:10.1002/j.1538-7305.1984.tb00045.x

Cited by 10 publications

(1 citation statement)

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“…The index I in eqs. (5) and (6) explicitly denotes reference to the main polarization channel; nI( t) is filtered Gaussian noise with variance q~I; and 4JI represents the relative phase difference between the modulator and demodulator oscillators. In terms of a specific sampling epoch, to, distortion in the overall channel impulse response is minimized by an optimum relative carrier phase"…”

Section: Channel Descriptionmentioning

confidence: 99%

Performance Signatures for Dual-Polarized Transmission of M-QAM Signals Over Fading Multipath Channels

Kavehrad

Siller

1985

At&T Technical Journal

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Performance signatures for dual‐polarized transmission of M‐state quadrature amplitude‐modulated signals over dispersive multipath digital radio channels are theoretically derived in this work. We report on two major findings. Firstly, we show that for the assumed propagation model, a cross‐coupled interferer exhibits noiselike behavior and impacts on digital radio outage time in direct relation to its power level. Secondly, our theoretical finding is based on a new application of performance signature curves for two cross‐coupled multipath channels. This treatment permits the prediction of multipath‐induced digital radio outage for specified ratios of power in the copolarized and cross‐coupled signals. Theoretical findings are qualitatively supported by measured performance signatures obtained from a laboratory simulation of the model.

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Section: Channel Descriptionmentioning

confidence: 99%