Nokia Corporation

Jae H Son

Tony R Reid

Victor Stolpman

Hua Zhang

Anthony Reid

Nico Van Waes

Jan C Olivier

Juha Heiskala

Jian Zhong Zhang

A network entity in a multi-transmit antenna system, such as a transmitting or receiving entity, includes a component such as a pre-coder or a receiver, and is configured for full-spatial-rate coding data. The network entity is capable of providing a full-spatial-rate codebook having been designed by selecting an underlying partial-spatial-rate codebook designed for a system configured for partial-spatial-rate coding data. The full-spatial-rate codebook can then be designed in a manner including defining the full-spatial-rate codewords based upon partial-spatial-rate codewords of the partial-spatial rate codebook and basis vectors of a null space of the respective partial-spatial-rate codewords in a multidimensional vector space. The network entity can also be capable of selecting codewords of the codebook in accordance with a sub-space tracking method whereby the codewords of the codebook can be selected in a manner that exploits correlations therebetween.

System and method for precoding in a multiple-input multiple-output (MIMO) system

Fast fading in cellular systems causes time variation of the Channel Impulse Response (CIR) resulting in significant performance degradation that is reduced by adding a pulse train to the transmitted data symbols and estimating the CIR by averaging the symbols as they vary from one OFDM symbol to another within the physical data frame (or packet).

High doppler channel estimation for OFD multiple antenna systems

A method, computer program and apparatus operate so as to execute a two-dimensional (2-D) M survivor multi-resolution search algorithm and procedure for a signal received over a channel. The method includes, from one search stage to a next search stage, increasing parameter resolution while fixing a number of search operations at each search stage by a predetermined number of parameter survivors (M); and determining a Maximum Likelihood joint metric based on an accumulated value of survived search stages.

Apparatus, method and computer program product providing a computationally efficient maximum likelihood joint synchronization and channel estimation algorithm

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Dallas, TX, United States of America

Jae H Son