Apparatus for OFDMA transmission and reception for coherent detection in uplink of wireless communication system and method thereof
US7639660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2004 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Apr 12, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2626
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In the resource mapping method for data transmission, a time-frequency resource of a slot interval including OFDM symbols is divided into traffic channels and shared among the subscribers, the traffic channel including resource blocks uniformly distributed in the whole transmit frequency band, the resource block including consecutive subcarriers of consecutive received symbols having at least one inserted pilot symbol. The pilot symbols and the channel-encoded and modulated data symbols are processed by time-frequency mapping according to the resource-block-based mapping method to generate received symbols. The receiver separates the received symbols by subscribers according to the resource-block-based mapping method in a frequency domain, and performs iterative channel estimation, demodulation, and decoding by using the pilot and a data reference value after decoding for each traffic channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.