An SFBC-OFDM receiver to combat multiple carrier frequency offsets in cooperative communications

Lu, Tsung-Ta; Lin, Hsin-De; Sang, Tzu-Hsien

doi:10.1109/pimrc.2010.5672079

Cited by 11 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, out of two sets of decoded signals, more reliable signal is decided based on the minimum Euclidean distance decision criterion. In [9], the two branches receiver architecture is modified to combine the two separately synchronized signals, which leads to the increase of resulting signal to interference-plus-noise ratio (SINR) similarly to the maximum ratio combining (MRC) technique. In the area of asynchronous cooperative systems, a new space-time coding scheme is proposed in [10], where an OFDM symbol is modulated onto a group of subcarriers with proper weighting coefficient so that the ICI within the same group can be self-cancelled.…”

Section: Introductionmentioning

confidence: 99%

Iterative Detection and ICI Cancellation for MISO-mode DVB-T2 System with Dual Carrier Frequency Offsets

et al. 2012

View full text Add to dashboard Cite

In the DVB-T2 system with a multiple-input single-output (MISO) transmission mode, Alamouti coded orthogonal frequency division multiplexing (OFDM) signals are transmitted simultaneously from two spatially separated transmitters in a single frequency network (SFN). In such systems, each transmit-receive link may have a distinct carrier frequency offset (CFO) due to the Doppler shift and/or frequency mismatch between the local oscillators. Thus, the received signal experiences dual CFOs. This not only causes dual phase errors in desired data but also introduces inter-carrier interference (ICI), which cannot be removed completely by simply performing a CFO compensation. To overcome this problem, this paper proposes an iterative detection with dual phase errors compensation technique. In addition, we propose a successive-iterative ICI cancellation technique. This technique successively eliminates ICI in the initial iteration by exploiting pre-detected data pairs. Then, in subsequent iterations, it performs a fine interference cancellation using a priori information, iteratively fed back from the channel decoder. In contrast to previous works, the proposed techniques do not require estimates of dual CFOs. Their performances are evaluated via a full DVB-T2 simulator. Simulation results show that the DVB-T2 receiver equipped with the proposed dual phase errors compensation and the successive-iterative ICI cancellation techniques achieves almost the same performance as ideal dual CFOs-free systems, even for large dual CFOs.

show abstract

Section: Introductionmentioning

confidence: 99%