Title :
The MIMO OFDM receiver with mismatched transmit carrier frequency offsets
Author_Institution :
Dept. of Commun. Eng., Nat. Central Univ., Jhongli, Taiwan
Abstract :
The combination of multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) has been adopted as the next-generation wireless LAN technology. In this paper, we consider the design of a 2×2 space-time block coded (STBC) MIMO-OFDM baseband receiver with different carrier frequency offsets between transmit antennas due to an antenna resistance match problem. We propose a new carrier frequency offset tracking algorithm to estimate the mismatch of carrier frequency offsets between two transmit antennas. As the carrier frequency mismatch is corrected at transmitters via the side information channel, the performance of the MIMO OFDM receiver can approach the result without carrier frequency offsets. The overall receiver is also designed on the Xilinx FPGA with an implementation loss of about 1.5 dB.
Keywords :
MIMO communication; OFDM modulation; antenna arrays; field programmable gate arrays; frequency estimation; next generation networks; radio receivers; transmitting antennas; wireless LAN; STBC MIMO-OFDM baseband receiver; Xilinx FPGA; antenna resistance match problem; carrier frequency offset tracking algorithm; mismatched transmit carrier frequency offsets; multiple-input multiple-output receiver; next-generation wireless LAN technology; orthogonal frequency division multiplexing; side information channel; space-time block coded MIMO-OFDM baseband receiver; transmit antennas; transmitters; Channel estimation; Decoding; Modulation; OFDM; Receivers; Timing; Transceivers; IEEE 802.11n; MIMO-OFDM; STBC; carrier frequency offset; transmit antenna;
Conference_Titel :
ITS Telecommunications (ITST), 2012 12th International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-3071-8
Electronic_ISBN :
978-1-4673-3069-5
DOI :
10.1109/ITST.2012.6425300