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Time domain interleaved partitioning partial transmit sequence method (TD-IP-PTS) needs only one inverse fast Fourier transform (IFFT) to reduce peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) system. However, for one long OFDM symbol, it will need waiting time and many registers to implement the combination of phase factor in TD-IP-PTS. Therefore, the speed...
Partial transmit sequence (PTS) scheme is an attractive technique for peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems. However it needs many candidates to obtain preferable PAPR performance, which will result in high computational complexity. In order to alleviate the problem, this paper proposes a novel partial transmit sequence (PTS) technique,...
The conventional design of channel equalizer for IEEE 802.11a wireless local area network (WLAN) does not consider the different requirements of the adopted modulation schemes. In this paper, an adaptive-modulation-oriented channel equalizer and its VLSI architecture are developed. We analyze the different computation efforts of the modulation schemes and consider the system-level adaptive-modulation...
In this paper, we present two efficient cyclicity restoration (CR) schemes for orthogonal frequency-division multiplexing (OFDM) systems to combat intersymbol interference (ISI) and intercarrier interference (ICI) when the channel impulse response is longer than cyclic prefix (CP). First, we introduce a parallel scheme using the tentative signals generated in time domain, which provides low computational...
In this paper, a new low complexity equalization scheme is presented to mitigate inter-symbol interference (ISI) and inter-carrier interference (ICI) for orthogonal frequency division multiplexing (OFDM) systems with insufficient cyclic prefix (CP). After conventional decision-feedback ISI cancellation, the proposed scheme cancels ICI in frequency domain. By using tentative hard decisions, the new...
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