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US 2007/0165739 A1Published application
High rate transmission diversity transmission and reception
AssigneeNokia Corporation
InventorsAri Hottinen, Olav Tirkkonen
Life of this patent
Estimating the term…
Abstract
The performance and symbol rate in a wireless mobile system are increased by forming a transmission code matrix using transformed orthogonal codes, in such a way that the code is robust to channel statistics and operates well in both Ricean and (correlated) Rayleigh channels. Furthermore, the invention enables high symbol rate transmission using multiple transmit antennas, and one or multiple receive antennas, and obtains simultaneously high diversity order and high symbol or data rate.
Claims12
A method for receiving a signal comprising:
- estimating the impulse response estimates from each transmit antenna path to each receive antenna,
- calculating bit or symbol estimates for transmitted signal stream or streams using the structure of a transmission matrix, said matrix comprising at least one linear combination of two orthogonal space-time code matrices or channel symbols, and said channel impulse response estimates.
An apparatus for receiving a signal comprising:
- a channel estimation module that outputs estimates of the impulse response estimates from each transmit antenna path to each receive antenna;
- and
- a detection module that uses the structure of a transmission matrix, said matrix comprising at least one linear combination of two orthogonal space-time code matrices or channel symbols, and channel impulse response estimates to calculate bit or symbol estimates for transmitted signal stream or streams.
Dependencies are inferred from the claim text.