Introduction of Frequency-Domain Signal Processing to Broadband Single-Carrier Transmissions in a Wireless Channel

2013 IEEE 78th Vehicular Technology Conference (VTC Fall)

2013

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Abstract-Orthogonal frequency division multiplexing (OFDM) has been attracting much attention due to the robustness against the frequency selective fading. Instead of well-known cyclic prefix (CP) insertion, a known training sequence (TS) insertion can also be used for OFDM block transmission. In this paper, we propose a new receiver design, which can obtain the frequency diversity gain through the use of frequency-domain equalization (FDE), for TS-OFDM. The conditional bit error rate (BER) analysis of the proposed FDE is presented. The average BER performance of the TS-OFDM signal transmission in a frequency-selective Rayleigh fading channel is evaluated by Monte-Carlo numerical computation method using the derived conditional BER and is confirmed by computer simulation. Numerical results show the proposed TS-OFDM receiver improves BER and throughput performances of TS-OFDM compared to the conventional TS-OFDM receiver. It was also shown that the TS-OFDM with the proposed receiver provides better BER and throughput performances than the CP-OFDM due to the frequency diversity gain.

Section: Data Demodulationmentioning

confidence: 99%

A Novel Receiver Design for Training Sequence Inserted OFDM Transmission

Yamamoto

2013 IEEE 78th Vehicular Technology Conference (VTC Fall)

2013

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“…The minimum mean square error (MMSE) based frequency-domain equalization (FDE) can be used to improve bit error rate (BER) performance [2][3][4]. An additional use of antenna diversity further improves BER performance [5].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Space-Time Block Coded Joint Tx/Rx Diversity Using Optimal Transmit FDE in Presence of Channel Estimation Error

Miyazaki

2014 IEEE 79th Vehicular Technology Conference (VTC Spring)

2014

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Abstract-Single-carrier (SC) transmission using frequencydomain space-time block coded joint transmit/receive diversity (FD-STBC-JTRD) combined with transmit frequency-domain equalization (FDE) obtains full spatial diversity gain and frequency diversity gain. Recently, we derived the optimal transmit frequency-domain equalization (FDE) for SC FD-STBC-JTRD and showed that the optimal transmit FDE, which uses multiple weight matrices corresponding to multiple coded blocks in a STBC code-word, achieves the received signal-to-interference plus noise power ratio (SINR) 1/R STBC times higher than the conventional transmit FDE which uses the single weight matrix over a STBC code-word, where R STBC denotes the STBC code rate. However, our past study of SC FD-STBC-JTRD with the optimal transmit FDE assumed ideal channel estimation. In this paper, we provide theoretical analysis of the received SINR and the conditional bit error rate (BER) of SC FD-STBC JTRD with cyclic delay pilot channel estimation (CDP-CE) and discuss the impact of channel estimation error. Then, we evaluate, by computer simulation, the average BER performance when using SC FD-STBC-JTRD with the optimal transmit FDE and show that the optimal transmit FDE can achieve the received SINR 1/R STBC times higher than the conventional transmit FDE even in the presence of the channel estimation error.

“…The minimum mean square error (MMSE) based frequency-domain equalization (FDE) can be used to improve the bit error rate (BER) performance [2,3]. An additional use of antenna diversity further improves the BER performance.…”

Section: Introductionmentioning

confidence: 99%

Transmit FDE weight design for single-carrier space-time block coded joint transmit/receive diversity

Miyazaki

2013 9th International Conference on Information, Communications &Amp; Signal Processing

2013

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Abstract-Single-carrier (SC) transmission using frequencydomain space-time block coded joint transmit/receive diversity (FD-STBC-JTRD) combined with transmit frequency-domain equalization (FDE) obtains full spatial diversity gain and frequency diversity gain. Channel state information (CSI) is required only at transmitter for transmit FDE. In our previous study of SC FD-STBC-JTRD, single transmit FDE weight matrix was used. In this paper, noting that a sequence of data blocks is STBC encoded into a code-word composed of a new sequence of coded data blocks, we derive the optimal transmit FDE weight design. Multiple transmit FDE weight matrices, each associated with each coded block in a STBC code-word, are used unlike our previous transmit FDE weight design. Transmit FDE weight matrices are jointly optimized based on the minimization of the mean square error (MSE) between the transmitted signal before STBC encoding and the received signal after STBC decoding. We show by theoretical analysis that the optimal transmit FDE weight design can achieve 1/R STBC times higher signal-tointerference plus noise power ratio (SINR) than our previous design (single transmit FDE weight matrix), where R STBC denotes the STBC coding rate. And then, we show, by computer simulation, the optimal transmit FDE weight design achieves better bit error rate (BER) performance than our previous design.