Serially concatenated space-time code (SCSTC) forhigh rate wireless communication systems

Effective design of recursive convolutional space-time codes with an arbitrary number of transmit antennas

“…Motivated by the need to achieve excellent performance over fading channels, lots of efforts have been made to design the serially concatenated space-time code (SCSTC) that employs space-time trellis code (STTC) as the inner code [1][2][3][4][5]. Among the available schemes, standard STTC was used as the inner code in [1] and [2], while recursive STTC (R-STTC) was studied in [3][4][5] to obtain both diversity gains and interleaving gains.…”

“…Among the available schemes, standard STTC was used as the inner code in [1] and [2], while recursive STTC (R-STTC) was studied in [3][4][5] to obtain both diversity gains and interleaving gains. A STTC was connected with RS code by an interleaver to form a solution scheme for GSM in [1].…”

“…A STTC was connected with RS code by an interleaver to form a solution scheme for GSM in [1]. The serially concatenated space-time code (SCSTC) constructed by a convolutional code and a STTC code is proposed in [2], where an iterative decoding algorithm is presented to improve the performance. In [5], Gulati and Narayanan constructed a class of recursive STTC based on delay diversity (called DR-STTC in this paper) scheme and further extended DR-STTC to the case with more than two transmit antennas.…”

“…When 2 b -ary modulation is deployed, all the available STTCs that are used in serial or parallel concatenations, including those in [1], [2], [5] and [6], always keep the spectral efficiency as b bits/s/Hz no matter how many transmit antennas and memory orders are used. For example, 4PSK DR-STTC with three transmit antennas has 4 memory orders while the spectral efficiency still equals 2 bits/s/Hz [5].…”