Transmitter apparatus, receiver apparatus, communication apparatus and communication system

A technology of a transmitting device and a communication system, applied in the field of communication systems, can solve the problems of transmission rate control, inability to use limited frequency bands more effectively, and inability to allocate more transmission information, etc., and achieve the effect of improving transmission quality

Inactive Publication Date: 2009-09-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the interleaving method between spatial streams in the above-mentioned conventional MIMO multiplexing transmission, since the reception quality of transmission data is equalized by interleaving, it is not possible to perform transmission according to the transmission quality of each spatial stream as described above. Rate control, transmit power control, etc.
Therefore, there are problems as follows: it is impossible to allocate more transmission information on high-quality spatial streams, and it is impossible to use the limited frequency band more effectively

Method used

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  • Transmitter apparatus, receiver apparatus, communication apparatus and communication system
  • Transmitter apparatus, receiver apparatus, communication apparatus and communication system
  • Transmitter apparatus, receiver apparatus, communication apparatus and communication system

Examples

Experimental program
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Embodiment approach 1

[0052] Picture 1-1 It is a diagram showing an example of the functional configuration of Embodiment 1 of the transmission device of the present invention. Figure 1-2 It is a diagram showing another example of the functional configuration of Embodiment 1 of the transmission device of the present invention. Such as Picture 1-1 , Figure 1-2 As shown, the transmission device of this embodiment is composed of a transmission data generation unit 1, an encoding unit 2, a distribution unit 3, modulation units 4-1 to 4-N (N: the number of transmission antennas), a DAC (Digital Analog Converter, digital Analog converters) 5-1 to 5-N, RF sections 6-1 to 6-N, transmitting antennas 7-1 to 7-N, and a control section 8 are configured. In addition, a part composed of the modulation unit 4, the DAC 5, the RF unit 6, and the transmission antenna 7 having the same branch number is referred to as one transmission branch 9-1 to 9-N. In this embodiment, one transmission branch corresponds to ...

Embodiment approach 2

[0083] Figure 5 It is a diagram showing an example of the functional configuration of Embodiment 2 of the transmission device of the present invention. In the transmission device of this embodiment, instead of the Picture 1-1 The control unit 8 of the structural example is provided with a control unit 8a. Other configurations are the same as those of Embodiment 1. For the part having the same function as Embodiment 1, add and Picture 1-1 The same symbols are used and explanations are omitted.

[0084] In this embodiment, a transmission priority is set for each transmission data block, and transmission data is allocated to the transmission branches 9-1 to 9-N according to the priority. Figure 6 An example of a method of allocating error correction coded transmission data blocks in this embodiment is shown. Figure 6 This is an example where N=3 and DN=2. exist Figure 6 Among them, the transmission data blocks 16 - 1 and 16 - 2 are transmission data blocks that have un...

Embodiment approach 3

[0101] Figure 8 It is a diagram showing an example of the functional configuration of Embodiment 3 of the transmission device of the present invention. In the transmission device of this embodiment, for Embodiment 1 Picture 1-1 The example of the functional configuration of FIG. 10 adds interleavers 21 - 1 to 21 -N for interleaving, and includes a control unit 8 b instead of the control unit 8 of the first embodiment. The control unit 8b adds a function of instructing the interleavers 21-1 to 21-N on the interleaving processing method to the functions of the control unit 8 according to the first embodiment. Other configurations are the same as those of Embodiment 1. For the part having the same function as Embodiment 1, add and Picture 1-1 The same symbols are used and explanations are omitted.

[0102] Next, the operation of the transmission device according to this embodiment will be described. The operation of this embodiment is the same as that of Embodiment 1 or Emb...

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Abstract

A transmitter apparatus, which divides transport data into spatial streams and then transmits them in parallel with one another in MIMO communication system, comprises a control part (8) that selects modulation schemes for the respective spatial streams and decides, based on the modulation schemes, a data distributing method for each of the spatial streams; a distributing part (3) that distributes, based on the data distributing method decided by the control part (8), the transport data for each of the spatial streams; and modulating parts (4-1 to 4-N) that use the modulation schemes, which were selected by the control means for the respective spatial streams, to modulate the distributed data of the spatial streams outputted by the distributing part (3).

Description

technical field [0001] The present invention relates to a sending device in a wireless communication system, in particular to a sending device, a receiving device, a communication device and a communication system for performing MIMO (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) multiplexing transmission. Background technique [0002] In MIMO multiplexing transmission, a transmission signal is allocated to a plurality of spatial streams, but when the spatial streams are fixedly allocated to the transmission signal, the communication quality of each transmission signal varies. In order to solve this problem, conventionally, the communication quality of each transmission signal is equalized by periodically changing the correspondence between transmission signals and spatial streams, thereby improving the resistance to channel estimation errors due to communication channel fluctuations and the like. For example, in the following Non-Patent Document 1, it is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/00H04J99/00
CPCH04L1/1887H04L1/0059H04L1/007H04L1/0067H04L1/0003H04L1/0071H04L1/0066H04L1/0057H04B7/0413H04B7/0697
Inventor 元吉克幸
Owner MITSUBISHI ELECTRIC CORP
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