| Presentation | 1993/9/30 A New Burst Coherent Demodulator for Microcellular TDMA/TDD Systems Yoichi Matsumoto, Shuji Kubota, Shuzo Kato, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a new burst coherent demodulator for microcellular.TDMA, TDD systems.The demodulator employs a -pi/4 signal phase rotator for the coherent detection of pi/4-shift DQPSK signals and a reverse-modulation type carrier recovery circuit with a carrier filter varied band-width for fast carrier acquisition.Moreover,the demodulator uses an initial clock recovery circuit that operates at the rate of 2 samples/symbol effective for low power operation and makes it possible to shorten preamble bits for initial clock recovery.Furthermore,a burst detector and an automatic frequency control (AFC) circuit,both of which are easily implemented with fully digitalized circuits,are employed.Experimental results show that the proposed coherent demodulator reduces the irreducible frame error rate by 40%,and achieve a 3dB improvement at the frame error rate of 10% compared with differential detection under the Rayleigh fading channel (fD= 4Hz and τrms=1.0μsec in a 96kbit/s experimental system) typical o f personal communication channels. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Burst demodulator / Coherent detection / Microcellular / TDMA / TDD / π/-shift QPSK |
| Paper # | RCS93-58 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 1993/9/30(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A New Burst Coherent Demodulator for Microcellular TDMA/TDD Systems |
| Sub Title (in English) | |
| Keyword(1) | Burst demodulator |
| Keyword(2) | Coherent detection |
| Keyword(3) | Microcellular |
| Keyword(4) | TDMA |
| Keyword(5) | TDD |
| Keyword(6) | π/-shift QPSK |
| 1st Author's Name | Yoichi Matsumoto |
| 1st Author's Affiliation | NTT() |
| 2nd Author's Name | Shuji Kubota |
| 2nd Author's Affiliation | NTT |
| 3rd Author's Name | Shuzo Kato |
| 3rd Author's Affiliation | NTT |
| Date | 1993/9/30 |
| Paper # | RCS93-58 |
| Volume (vol) | vol.93 |
| Number (no) | 255 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |