| Presentation | 2003/1/9 Decision-Directed Joint ESPAR Antenna Beam forming and Rate Adaptation in an OFDM-Based Multi-Rate System Thomas HUNZIKER, Masaya HASHIGUCHI, Takashi OHIRA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The electronically steerable parasitic array radiator (FSPAR) single-port antenna offers beam forming capabilities at low complexity and power consumption. The beam pattern is optimized by adjusting the reactances of varactors beneath the passive ESPAR antenna elements, employing e.g. a steepest gradient algorithm. In this paper we propose to accomplish the beam forming in a decision-directed fashion. This evades the need for long training sequences and allows to step-wise increase the modulation level and/or code rate as the SINR grows. The performance of the decision-directed joint beam forming and rate adaptation scheme is investigated for an IEEE802.11a multi-rate OFDM physical layer in computer simulations. It turns out that in some transmission scenarios the average bandwidth efficiency can be increased by about a factor 2 compared to a system with a beam forming based on training sequences. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ESPAR antenna / Decision-directed parameter estimation / Beam forming / Rate adaptation / Steepest gradient method / OFDM |
| Paper # | DSP2002-163,SAT2002-113,RCS2002-232 |
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| Conference Information | |
| Committee | DSP |
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| Conference Date | 2003/1/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Digital Signal Processing (DSP) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Decision-Directed Joint ESPAR Antenna Beam forming and Rate Adaptation in an OFDM-Based Multi-Rate System |
| Sub Title (in English) | |
| Keyword(1) | ESPAR antenna |
| Keyword(2) | Decision-directed parameter estimation |
| Keyword(3) | Beam forming |
| Keyword(4) | Rate adaptation |
| Keyword(5) | Steepest gradient method |
| Keyword(6) | OFDM |
| 1st Author's Name | Thomas HUNZIKER |
| 1st Author's Affiliation | ATR Adaptive Communications Research Laboratories() |
| 2nd Author's Name | Masaya HASHIGUCHI |
| 2nd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| 3rd Author's Name | Takashi OHIRA |
| 3rd Author's Affiliation | ATR Adaptive Communications Research Laboratories |
| Date | 2003/1/9 |
| Paper # | DSP2002-163,SAT2002-113,RCS2002-232 |
| Volume (vol) | vol.102 |
| Number (no) | 544 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |