Abstract
Turbo codes enable the operation of communication systems at very low SNR values, but the needed carrier frequency and phase synchronization at the receiver still remains a problem for short packets at these low SNR values. In this paper, a new efficient carrier synchronization method, the M 2S2O (Maximum-Mean-Square-Soft-Output) method, for turbo coded short packet communication at low SNR values is presented. This method is based on maximizing a newly invented cost function, the MSSO function. This function is the Mean Squared Soft Output of the turbo decoder and is found to be a convex function of the phase and frequency errors, with a global single maximum, thus enabling both acquisition and tracking of the carrier frequency and phase offsets. It is shown, via simulations, that this carrier synchronization algorithm enables un- degraded turbo decoding performance at these very low SNR values.
| Original language | English |
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| Pages | 68-71 |
| Number of pages | 4 |
| State | Published - 2004 |
| Externally published | Yes |
| Event | 2004 23rd IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings - Tel-Aviv, Israel Duration: 6 Sep 2004 → 7 Sep 2004 |
Conference
| Conference | 2004 23rd IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings |
|---|---|
| Country/Territory | Israel |
| City | Tel-Aviv |
| Period | 6/09/04 → 7/09/04 |
Keywords
- Packet Radio
- Phase and Frequency Synchronization
- Turbo Coding