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Method for transmitting a stream of data in a wireless system with at least two antennas and transmitter implementing said method

A data stream and transmitter technology, applied in the field of transmitting data stream, can solve the problems of over-complexity, non-optimal receiver, and reduced scheme performance, etc., to achieve the effect of increasing robustness, low SNR, and reducing lattice complexity

Inactive Publication Date: 2009-09-02
INTERDIGITAL CE PATENT HLDG
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  • Application Information

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Problems solved by technology

However, such schemes require higher bit rates to achieve the targeted high spectral efficiency, which degrades the performance of these schemes
Furthermore, such schemes require the generation of soft bits at the output of the space-time detection to be fed to the input of the channel decoder, resulting in an overly complex or non-optimal receiver

Method used

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  • Method for transmitting a stream of data in a wireless system with at least two antennas and transmitter implementing said method
  • Method for transmitting a stream of data in a wireless system with at least two antennas and transmitter implementing said method
  • Method for transmitting a stream of data in a wireless system with at least two antennas and transmitter implementing said method

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Embodiment Construction

[0028] figure 1 shows a baseband transmitter according to one embodiment of the present invention. In this embodiment, a Reed Solomon encoder 1 is first used as a non-binary code encoder to encode data bits. The encoder uses a symbol alphabet consisting of k bits, where the symbol size k is used to divide the number of bits per space-time codeword used for multi-carrier modulation as will be described later. A non-binary encoder generates codewords on the same k-bit symbol alphabet from a sequence of symbols. Then, these symbols are interleaved by the k-bit symbol interleaving circuit 2 . Specifically, the interleaving circuit is a row and column interleaving circuit, which will be referred to later figure 2 Be explained. Split the stream of binary interleaved symbols into a log to be modulated by QAM modulation 2 Group of (M) bits. In this embodiment, the modulation is 32QAM modulation. Therefore, each log 2 The (M) group includes 5 bits. Then, in circuit 3, each g...

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Abstract

The present invention relates to a method for transmitting a stream of data in a communication system with at least two transmission antennas and a transmitter implementing said method. The method comprises the steps of: dividing the stream of data elements in first words of k bits, encoding (1) the first words with a non binary code, the first words being the symbols of the non binary code and the size (k) in bits of the code symbols dividing the number of bits per space-time codeword, interleaving (2) the encoded symbols by a symbol wise interleaver, splitting the interleaved bit stream thus obtained into groups of log2 (M) bits, mapping (3) the groups of log2 (M) bits onto complex symbols using a constellation of M points, then coding (4) the complex symbols using a space-time code to obtain space-time code words.

Description

technical field [0001] The invention relates to a method of transmitting a data stream in a wireless system comprising a transmitter having at least two antennas. The invention also relates to a transmitter implementing the method and a receiver for receiving signals transmitted using the method. Background technique [0002] Existing and future wireless communication systems require a constant increase in throughput while maintaining high transmission quality. Among other things, these systems have the ability to establish services including high-quality data and video transmission channels as a goal. More specifically, spectral efficiency is key to increasing throughput, yet the dedicated radio spectrum and / or licensed transmit power for these wireless systems may not increase commensurately. [0003] In this context, multiple-input-output (MIMO) techniques using multiple antennas on both the transmitter and receiver sides are very promising since they provide large chan...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/02
CPCH04L27/2602H03M13/27H03M13/1515H04L27/2626H04L1/0606H04L1/0625
Inventor 阿诺·盖冈
Owner INTERDIGITAL CE PATENT HLDG
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