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Iterative multiple-input multiple-output communication system and method based on IDMA

A communication system, multi-output technology, applied in the transmission system, digital transmission system, electrical components, etc., can solve the problem that the interference cannot be really removed, and achieve the effect of overcoming MAI interference, low complexity, and good application prospects

Inactive Publication Date: 2015-12-23
FUDAN UNIV
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Problems solved by technology

However, the above method can only suppress MAI, and cannot really remove this interference, but only temporarily alleviates this contradiction

Method used

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  • Iterative multiple-input multiple-output communication system and method based on IDMA
  • Iterative multiple-input multiple-output communication system and method based on IDMA
  • Iterative multiple-input multiple-output communication system and method based on IDMA

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Embodiment Construction

[0029] For the optimal Bayesian interleaved iterative MIMO communication method proposed by the invention, the specific implementation steps are as follows:

[0030] Taking a MIMO system with one user, N transmit antennas, and one receive antenna as an example, to expand to K users and M receive antennas, only the figure 1 The sending end copies K copies and sums them up and sends them, and the receiving end copies M copies for processing. Analyze as a whole figure 1 , the user's information bit sequence d is encoded by FEC to generate a coded sequence c. Make N copies of the coding sequence c, and each copy c uses a specific interleaver ∏ i , i=1,...N for interleaving, the interleaved chip signal x i ,i=1,...,N perform BPSK modulation, generate modulation symbols and send them out. Each modulation symbol x i After multiplying the attenuation of each channel, the sum is added and the noise is superimposed, and is received at a receiving antenna at the receiving end. The re...

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Abstract

The present invention belongs to the technical field of wireless communication, and specifically discloses an iterative multiple-input multiple-output (MIMO) communication system and method based on IDMA. In the present invention, a non-orthogonal MIMO system is designed based on IDMA (Interleave-Division-Multiplexing-Access); a non-orthogonal access idea of IDMA is applied to the MIMO system; multi-antenna diversity can be realized by distributing different interleavers for different antennas, without the need for designing a complicate spreading code; and all FEC codes can be simply applied to the system. The method and the system of the present invention are applicable to any number of antennas, and can control an error rate of frame synchronization in an acceptable range.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to an iterative multiple-input multiple-output communication system and method based on IDMA (Interleave-Division-Multiplexing-Access). Background technique [0002] Multiple access of information exists in a multi-user system, and a popular multiplexing method is code division multiple access (CDMA), that is, multiple users use a shared frequency spectrum. In Code Division Multiple Access (CDMA), different spreading codes are used for different users during encoding, and it is hoped that the signals of different users are independent from each other through this selection method. However, in practice, it is difficult to ensure that the spreading codes of each user signal are strictly orthogonal, thus causing multiple access interference (MAI) to be introduced at the receiving end. Moreover, as the number of users increases or the signal power increases, the Multiple...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0071H04L1/005H04L1/0055
Inventor 赵鑫周小林田雪琛
Owner FUDAN UNIV
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