Abstract
Turbo codes have been recently adopted in the next generation of wideband CDMA standards. These codes achieve superior performance at the expense of high computational complexity. This makes their low energy implementation a very important yet challenging problem. In this paper we study the effect of different approximation techniques such as pruning the trellis, reducing the number of states, sliding window, early termination on the Bit Error Rate (BER) and energy consumption for a Turbo decoder implemented on a general purpose processor. We show that a combination of these techniques can result in 66.5% energy reduction for a log-MAP based Turbo decoder if a loss of 1.4 dB in SNR can be tolerated at BER = 10 -5.
Original language | English (US) |
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Title of host publication | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
Volume | 3 |
State | Published - 2002 |
Event | 2002 IEEE International Conference on Acoustic, Speech, and Signal Processing - Orlando, FL, United States Duration: May 13 2002 → May 17 2002 |
Other
Other | 2002 IEEE International Conference on Acoustic, Speech, and Signal Processing |
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Country/Territory | United States |
City | Orlando, FL |
Period | 5/13/02 → 5/17/02 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Signal Processing
- Acoustics and Ultrasonics