Smart base stations for "dumb" time-division duplex terminals

Benjamin, R.; Kaya,; Nix, AR

doi:10.1109/35.747261

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…The number of segments increases with the length of the arc. The coordinates of the endpoints of each segment are substituted into (7). The point with the smallest value of the function is chosen as the best signal point.…”

Section: ) Precodingmentioning

confidence: 99%

“…Thus, the PDFD and DFNPI schemes can be used in the reverse link but are not desirable for use in the forward link where the receiver is the portable unit. One way to maintain the low complexity of the portable unit is to move channel equalization functions in the forward link from the portable unit receiver to the base-station transmitter [7]. This technique is called precoding or preequalization.…”

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confidence: 99%

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Channel precoding with small envelope variations for π=4-QPSK and MSK over frequency-selective slow fading channels

Lee¹,

Zhuang

2003

IEEE Trans. Veh. Technol.

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Abstract-This paper presents channel precoding schemes to combat intersymbol interference (ISI) over a frequency-selective slow fading channel in wireless communication systems using 4 shifted quadrature phase-shift keying or minimum shift keying. Based on the dimension partitioning technique, the precoders predistort the phase of the transmitted symbol in the forward link to combat ISI, keeping the transmitted symbol amplitude constant. The proposed schemes can ensure the stability of the precoder even in equalizing a nonminimum-phase channel, combat ISI without increasing the complexity of portable unit receivers, and reduce the envelope variations of transmitted signals such that power-efficient nonlinear amplifiers can be used for the precoded signals without causing a significant undue distortion. Theoretical analysis and simulation results are presented to demonstrate the effectiveness of the proposed channel precoding schemes.Index Terms-Channel precoding, equalization, intersymbol interference (ISI), minimum shift keying (MSK), 4 shifted quadrature phase-shift keying ( 4-QPSK), slow frequency-selective fading.

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Section: ) Precodingmentioning

confidence: 99%

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confidence: 99%