| Presentation | 2013-01-25 Optimization of Viterbi decoding employing a heterogeneous cognitive radio for public mobile communication systems Masafimi MORIYAMA, Takeo FUJII, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, to improve reliability and to complement no service area of public mobile communication systems (PMCS) using a large zone scheme, we consider combining the PMCS with commercial systems such as cellular systems based on techniques of heterogeneous cognitive radio. The aim of this cognitive radio improves bit error rate (BER) by getting auxiliary information from the commercial systems when quality of PMCS is poor at mobile station. Since PMCS use convolutional code for Forward Error Correction (FEC), we deal with the methods which apply the auxiliary information to Viterbi decoding of a convolutional code in PMCS. Two methods named replacing method and adding method are proposed in this paper. Distance spectrum is often used to evaluate capability of convolutional code. In this paper, we show methods to compute the distance spectrum applying a replacing method and an adding method. Moreover, theoretical BER is calculated by using the distance spectrum. We confirmed that this theoretical BER accorded closely with BER estimated by computer simulation in large signal power to noise power ratio (SNR). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Public mobile communication systems / Cognitive radio / convolutional code / Viterbi decoding / Distance Spectrum |
| Paper # | SR2012-84 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2013/1/17(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optimization of Viterbi decoding employing a heterogeneous cognitive radio for public mobile communication systems |
| Sub Title (in English) | |
| Keyword(1) | Public mobile communication systems |
| Keyword(2) | Cognitive radio |
| Keyword(3) | convolutional code |
| Keyword(4) | Viterbi decoding |
| Keyword(5) | Distance Spectrum |
| 1st Author's Name | Masafimi MORIYAMA |
| 1st Author's Affiliation | AWCC, The University of Electro-Communications:PICRC, National Police Academy() |
| 2nd Author's Name | Takeo FUJII |
| 2nd Author's Affiliation | PICRC, National Police Academy |
| Date | 2013-01-25 |
| Paper # | SR2012-84 |
| Volume (vol) | vol.112 |
| Number (no) | 407 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |