Bit and Power Allocation Algorithm for OFDM UWB Systems

Abstract:

Ultra-wide-band (UWB) is a promising short-range indoor wireless communication technology for large communication capacity, high transmission rate, low power consumption, etc. Multi-band orthogonal frequency-division multiplexing ultra-wide-band (MB-OFDM UWB) system can achieve much higher anti-noise capability and flexibility. However, the transmission power of UWB systems is strictly restricted for avoiding the interference with other wireless communication systems existing in the same frequency spectrum range. It is necessary that adequately utilizes channel estimation to allocate bit and power effectively. According to the change of channel gain, UWB systems modify the allocation factor to optimize the performance of systems and reduce power allocation remainder. Simulation shows modified bit-power allocation algorithm can enhance power allocation efficiency. Furthermore, it is found that the power remainder of modified allocation factor algorithm is less influenced by the bit error rate.

• Periodical: Advanced Materials Research (Volumes 760-762)
• Pages: 472-477
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.760-762.472
• Online since: September 2013
• Authors: Hai Yan Li
• Keywords: Bit Error Rate (BER), Bit-Power Allocation, Orthogonal Frequency Division Multiplexing (OFDM), UWB

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