Lucent Technologies Inc.

Paul Edward Strauch

Carlo Luschi

Ran-Hong Yan

Syed Aon Mujtaba

Alexandr Kuzminskiy

Magnus Sandell

Stephan Ten Brink

In a radio telecommunications system such as GSM or EDGE, at each timeslot a small number of information symbols in narrow bands of the data payloads adjacent each tail of the timeslot are used as training-like symbols; for each burst, the end of the timeslot more affected by asynchronous CCI is sensed, and the training-like symbols at that end are processed, together with conventional midamble training symbols and tails symbols, by a CCI rejection algorithm.

Filter for telecommunications system

A mobile telephone system includes a base station which establishes a link with a selected mobile station. The received signal from the mobile station will include a noise component as well as a possible interference component from another mobile station operating at the same frequency in another cell. The base station has a trellis based equalization system which operates on the assumption that the received signal includes components which have a predominantly Gaussian characteristic. A switch controller determines when the interference component (which is non-gaussian) in the received signal becomes a dominant component and operates to switch a spatio-temporal filter into the circuit instead of the trellis based equalization system, to improve the bit error rate performance.

Radio communication systems

A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E&lcub;&par;r&minus;Bh&par; r&rcub;. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).

Channel estimation using soft-decision feedback

Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.

Growing community of inventors

Swindon, United Kingdom

Paul Edward Strauch