| Presentation | 1995/10/20 Performance of AW-CDM transmission system and adaptive equalizer for terrestrial digital broadcasting : Indoor experimental results in the multipath channel Hiroyuki HAMAZUMI, Yasuhiro ITO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | AW-CDM (Adaptively Weighted Code Division Multiplexing) hierarchical digital transmission system for terrestrial digital broadcasting provides both high quality services for fixed receivers and low quality services for mobile/portable receivers simultaneously. It is efficiently realized by power weighting for a part of the orthogonal codes in the system. The performance of weighted layer against multipath and noise is improved by process gain obtained by the power weighting. This paper describes indoor experimental results for prototype AW-CDM modem using a complex adaptive equalizer, which consists of four symbol (tip) rate FIR filters, to improve performance of non-weighted and negatively weighted layers in the multipath channel. The results of indoor transmission tests confirm that D/U (BER=10^<-3>) characteristics against multipath propagation are improved by 5 to 9dB (Layer 2 : non-weighed) and 7 to 11dB (Layer 3 : -3dB weighted). |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | digital broadcasting / hierarchical transmission / orthogonal codes / power weighted / multipath / adaptive equalization |
| Paper # | SST95-87 |
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| Conference Information | |
| Committee | SST |
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| Conference Date | 1995/10/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Spread Spectrum Technology (SST) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance of AW-CDM transmission system and adaptive equalizer for terrestrial digital broadcasting : Indoor experimental results in the multipath channel |
| Sub Title (in English) | |
| Keyword(1) | digital broadcasting |
| Keyword(2) | hierarchical transmission |
| Keyword(3) | orthogonal codes |
| Keyword(4) | power weighted |
| Keyword(5) | multipath |
| Keyword(6) | adaptive equalization |
| 1st Author's Name | Hiroyuki HAMAZUMI |
| 1st Author's Affiliation | NHK science and Technical Research Laboratories() |
| 2nd Author's Name | Yasuhiro ITO |
| 2nd Author's Affiliation | NHK science and Technical Research Laboratories |
| Date | 1995/10/20 |
| Paper # | SST95-87 |
| Volume (vol) | vol.95 |
| Number (no) | 303 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |