|Title of host publication||53rd IEEE Vehicular Technology Conference|
|Publisher or commissioning body||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication date||May 2001|
|Pages||648 - 652|
|Number of pages||5|
|Conference||53rd Vehicular Technology Conference 2001 (VTC 2001-Spring)|
|Period||1/05/01 → …|
Pre-compensation techniques can be used to enhance the bit error rate (BER) performance of time division duplex (TDD) orthogonal frequency division multiplexing (OFDM) communication links. With pre-compensation at the transmitter, the power assigned to each subcarrier is varied according to the channel state information (CSI). This paper derives a pre-compensation algorithm for OFDM systems that use coherent quadrature phase shift keying (QPSK) modulation on each subcarrier. The algorithm attempts to minimize the received BER subject to a constraint on the transmitted signal power. In order to yield a closed-form solution, the minimization is based on an approximation of the BER function, and is sub-optimal. The performance of the algorithm is compared with the fully optimal solution. In addition, the possible exploitation of the technique within a wireless local area network (WLAN) is discussed.
Rose publication type: Conference contribution
Sponsorship: The financial support of Blue Wave Systems inc. and thc Engineering and Physical Sciences Research Council is gratefully acknowledged.
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- OFDM modulation, wireless LAN
53rd Vehicular Technology Conference 2001 (VTC 2001-Spring)
|Duration||1 May 2001 → …|