Iterative Receivers Based on Subblock Processing for Phase Noise Compensation in OFDM Systems

Wiener filter preprocessing for OFDM systems in the presence of both nonstationary and stationary phase noises

“…In 15 We now derive each term required to computeŜ opt in (14). From (3), the elements of SS in (17) and (18) can be obtained as…”

“…It is noted that without changing the structure of conventional OFDM systems, the proposed Wiener filter preprocessing algorithm is based on the statistics of phase http://asp.eurasipjournals.com/content/2013/1/7 noise (which can be obtained from measurements or data sheets) and performs directly on the received signal Y (see Figure 1 for illustration). Subsequently, the algorithms of previous researches on phase noise cancelation (e.g., [12][13][14][15][16][17]) can be performed based on the preprocessed received signalŜ opt instead of on the received signal Y. We will show in the next section that by utilizing the correlation inherently exists in phase noise process, the proposed Wiener filter preprocessing algorithm can effectively mitigate the ICI which results from phase noise and lower the error floor, and therefore significantly improve the performances of previous researches phase noise cancelation, especially in severe phase noise case.…”

“…The effect of phase noise on OFDM is commonly categorized as common phase error (CPE) and intercarrier interference (ICI). Several techniques have been proposed to estimate and compensate for phase noise in OFDM systems [12][13][14][15][16][17]. More specifically, by trading the ICI as additional noise, Wu and Bar-Ness [12] use minimum mean square error criterion to cancel the CPE.…”

“…Zou et al [15,16] propose to estimate a few phase noise components in the time domain and obtain the rest components by interpolation. In [17], each OFDM symbol is partitioned into several subblocks where phase noise process is assumed quasi-static over each subblock and therefore only the CPE of each subblock needs to be estimated.…”

Blind phase noise compensation for SC-FDMA with application to LTE-uplink

“…In [8]- [11], iterative detection and PN compensation techniques are proposed with pilot subcarriers used to estimate the PN-induced common phase-error (CPE) as an initialization for the PN process. In [9], the OFDM symbol is divided into sub-blocks where the PN process is assumed quasi-static over each sub-block. Furthermore, a Kalman filter for PN tracking is derived in [10] where knowledge of the This paper is supported by a NPRP grant from QNRF.…”