Differential detection of pi /4-shifted-DQPSK for digital cellular radio

A high-capacity digital cellular system is being developed in the US. This system will use filtered pi /4-shifted-DQPSK (differential quaternary phase-shift keying) modulation, achieving a spectral efficiency of 1.62 b/Hz. The BER (bit error rate) performance of this modulation was studied using dif...

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Bibliographic Details
Main Authors: Chennakeshu, S., Saulnier, G.J.
Format: Conference Proceeding
Language:English
Subjects:
Bit error rate
Detectors
Digital filters
Digital modulation
Error correction
Fading
Frequency
Phase detection
Phase modulation
Phase shift keying
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Summary:A high-capacity digital cellular system is being developed in the US. This system will use filtered pi /4-shifted-DQPSK (differential quaternary phase-shift keying) modulation, achieving a spectral efficiency of 1.62 b/Hz. The BER (bit error rate) performance of this modulation was studied using differential detection. A tangent-type differential detector with an integrated sample and carrier frequency error correction algorithm is presented. Theoretical and simulation BER results are presented for static and flat fading channels. Additional results are provided on the BER sensitivity to Doppler, time delay spread, carrier frequency errors, and DC offsets.< >
ISSN:1090-3038
2577-2465
DOI:10.1109/VETEC.1991.140474