Performance of serial concatenated convolutional code in Rayleigh multipath fading channel | |
| Author | Rahman, Mohammad Ghulam |
| Call Number | AIT RSPR no. TC-98-16 |
| Subject(s) | Telecommunication Error-correcting codes (Information theory) |
| Note | A research study submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Abstract | Convolutional code is widely used as a fo1ward error control scheme in wireless communication. Concatenation of convolutional codes reduces the probability of error exponentially using iterative decoding with increase in decoding complexity only algebraically. Concatenated coding schemes consist of the combination of two or more simple constituent encoders and interleavers. There are two kinds of concatenation of convolutional codes - serial concatenated convolutional code (SCCC) and parallel concatenated convolutional code (PCCC). In this study SCCC is considered for error correction. The performance of SCCC is evaluated in both A WGN channel and frequency selective fading channel. The fading channel is modeled as a two-ray Rayleigh fading channel. In the receiver a maximum a posteriori (MAP) equalizer is used to mitigate the ISi effect and iterative decoding technique is used for decoding. The core of iterative decoding structure is soft-input soft-output (SISO) a posteriori probability (APP) module. Benedetto approach for decoding is applied in this study. The BER performance is evaluated by Monte Carlo simulation. Simulation results show that 1.5 dB coding gain is achieved for fast varying (mobile speed 100 km/hr) frequency selective fading channel (FSRF) over slow varying (mobile speed 5 km/hr) FSRF channel on 61 h iteration at 10-4 BER value. |
| Year | 1998 |
| Type | Research Study Project Report (RSPR) |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Rajatheva, R.M.A.P.; |
| Examination Committee(s) | Ahmed, Kazi M. ;Zhang, Jian-Guo ; |
| Scholarship Donor(s) | Government of Finland; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1998 |