Patent
Method and apparatus for transmitting signals using codebooks in a wireless communication system that supports multiple antennas
TLDR
In this paper, a transmission method and apparatus using a codebook from that of a wireless communication system, more specifically to multi-antenna enabled wireless communication systems, is presented.Abstract:
The present invention is a transmission method and apparatus using a codebook from that of a wireless communication system, more specifically to multi-antenna enabled wireless communication system. A method of transmitting a downlink signal at a base station in accordance with one embodiment of the present invention includes the steps of receiving a first and a second precoding matrix indicator (PMI) from the terminal; A second matrix from the first PMI determining a first matrix (W1) from the first codebook comprising precoding matrix indication and the second codebook comprising precoding matrix to the second PMI is indicated (W2) determining, the step of determining a precoding matrix (W) based on the first matrix (W1) and a second matrix (W2); Performing precoding by using the determined precoding matrix (W) in one or more layers in which the downlink signal is mapped; And each of a precoding matrix contained in the first codebook, and transmitting the precoded signals to the mobile station is composed of a block diagonal matrix (block diagonal matrix), one block and one block of the comparison may be in the form became predetermined phase value is multiplied.read more
Citations
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References
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Patent
Signal generation using phase-shift based pre-coding
TL;DR: In this article, a phase shift based pre-coding scheme was proposed to support various spatial multiplexing rates while maintaining the advantages of the phase-shift diversity scheme, which has less channel sensitivity than that of the pre-code scheme, and only requires a low capacity codebook.
Patent
Method and precoder information feedback in multi-antenna wireless communication systems
TL;DR: In this article, a method for two component feedback in wireless communication systems is disclosed, with a wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix has at least two columns, and the base station obtaining a precoder from the first representation and the second representation.
Patent
Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
TL;DR: In this paper, a method for performing a precoding based on a generalized phase shift or an extended phase shift in a MIMO system employing several sub-carriers, and a transceiver for supporting the same is disclosed.
Patent
A method for receiving a precoded signal in collaborative multiple input multiple output communication system
TL;DR: In this article, a method for receiving a pre-coded signal in collaborative MIMO communication system is provided to perform pre-coding by sharing precoding matrix information transmitted from a terminal in a closed roof mode when transmitting data signal from multiple base station to a single terminal.
Patent
Methods of generating precoding codebook and transmitting data in multi input and multi output antenna system
TL;DR: In this article, a method of generating a pre-coding codebook and transmitting data in a multi-input and multi-output antenna system is provided to reduce complexity using a basic DFT(Discrete Fourier Transform) matrix in designing precoding based on a codebook.