Method and apparatus for resource mapping and code division multiplexing
AssigneeHuawei Technologies Co., Ltd.
InventorsWeijun Sun, Yongxing Zhou
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Abstract
The present disclosure discloses a method and an apparatus for resource mapping and code division multiplexing. In the present disclosure, each cell selects a mapping scheme among at least two mapping schemes to implement resource mapping, which effectively reduces interference imposed on reference signal symbols of users at the edge of a cell; vector switching is performed for an orthogonal matrix to obtain multiple different codeword sequences and implement codeword design, so that a problem that the output power of reference signal symbols is unbalanced can be effectively alleviated.
Claims10
A channel estimation value obtaining method in a wireless telecommunication system, comprising:
- receiving, by a user equipment, reference signal symbols of each space layer sent by a transmitter;
- wherein the reference signal symbols of each space layer were multiplexed on each reference signal sub-carrier according to a codeword sequence that is corresponding to each reference signal sub-carrier, the codeword sequence is one of a plurality of different codeword sequences, the codeword sequences were obtained by vector switching for a selected orthogonal matrix, and the codeword sequences are corresponding to each reference signal sub-carrier;
- obtaining, by the user equipment, a channel estimation value required for demodulating user data.
A codeword design apparatus in a wireless telecommunication system, comprising:
- a receiver, configured to receive reference signal symbols of each space layer sent by a transmitter;
- wherein the reference signal symbols of each space layer were multiplexed on each reference signal sub-carrier according to a codeword sequence that is corresponding to each reference signal sub-carrier, the codeword sequence is one of a plurality of different codeword sequences, the codeword sequences were obtained by vector switching for a selected orthogonal matrix, and the codeword sequences are corresponding to each reference signal sub-carrier;
- a processor, configured to obtain a channel estimation value required for demodulating user data.
Dependencies are inferred from the claim text.