Mobile unit for pilot symbol assisted wireless system and method of improving performance thereof
US6381290B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jun 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0202
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mobile unit for communicating with a transmitter which transmits signals in data bursts, such data bursts having a plurality of symbols therein including data symbols and a plurality of predetermined pilot symbols. The symbols have a discrete number of possible values. The unit further includes a receiver adapted to receive a data burst of the transmitted signals, memory with the predetermined pilot symbols and a plurality of signal filters, a comparator, a processor, and an output. The comparator compares the pilot symbols in a received data burst with the predetermined pilot symbols in the memory to determine correction factors for the pilot symbols. The processor uses the pilot symbol correction factors and the plurality of signal filters to derive a set of data symbol correction factors for each of the signal filters. The processor also adjusts discrete possible values of the data symbols by the data symbol correction factors and compares those adjusted values with the received data symbols to determine a cumulative error value among adjusted data symbols for each signal filter. The processor uses the data symbols derived by the signal filter having the lowest cumulative erro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.