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Signal transmitting method and apparatus based on unitary space-time coding

A technology for encoding signals and sending devices, which is applied in the field of signal transmission based on unitary space-time coding, can solve the problems of low efficiency, poor performance, and difficult retrieval in the retrieval process, and achieve improved coding performance, large diversity gain, and low coding complexity Effect

Active Publication Date: 2012-10-03
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

Among the USTM technologies, the most typical system design scheme is the system design scheme proposed by Bell Labs Hochwald et al. The constellation diagram construction of this scheme needs to rely on a very complicated computer retrieval process. When the constellation diagram size is large, the retrieval process will be very inefficient. Also, the greater the number of transmitting antennas, the more difficult the retrieval
In addition, the system design scheme can only bring extremely limited diversity gain when the constellation size is large, so the performance is poor when the data rate is high

Method used

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  • Signal transmitting method and apparatus based on unitary space-time coding
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  • Signal transmitting method and apparatus based on unitary space-time coding

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Embodiment Construction

[0025] figure 1 It shows a schematic diagram of the physical layer structure of a wireless transmitter based on LD coding in the prior art, wherein, for the convenience of expression, some devices / modules that are not substantially related to the core idea of ​​the present invention are omitted. Those skilled in the art understand that the above The omission has no material effect on the clarity of the description and the support of the claims. The illustrated transmitter is typically located in a base station, relay station or mobile terminal.

[0026] Depend on figure 1 It can be seen that the original information source bit stream contains Kx bits of data, after separation, it becomes K bit streams each containing x bits, called the 1st to Kth bit streams, and any bit stream of any of them It is called the kth bit stream. Each channel of bit streams enters the constellation map mapping device / module respectively, so as to obtain K channels of modulation symbols. Wherein...

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Abstract

A method for transmitting signals based on unitary space-time coding in a transmitter in a wireless communication network comprises: using multi blind detection coding matrices carrying on blind detection coding process to multi channels of signals to be coded separately, in order to generate multi channels of signals to be transmitted which are processed by blind detection coding(S12); transmitting the multi channels of signals to be transmitted which are processed by blind detection coding in multi symbol periods via a plurality of transmitting antennas(S14). A transmitting apparatus, a transmitter, and a network device use the method. The present invention doesn't need the channel status information when detecting the signals, has a lower coding complexity, a higher usage rate of spectrum, could be used to a transmitter with any number of transmitting antennas, could realize full diversity gains automatically, and improves the system performance during high data rates periods.

Description

technical field [0001] The present invention relates to a wireless communication network, in particular to a signal sending method and device based on unitary space-time coding in the wireless communication network. Background technique [0002] In future wireless communication networks, multiple-input multiple-output technology (MIMO) will be used to achieve higher spectrum utilization, higher channel bandwidth, and higher data transmission rates. As a transmit diversity scheme, space-time coding plays an important role in MIMO systems. [0003] In the space-time coding technology, the linear dispersive (LD) code is a commonly used coding method, which can not only support a high data rate, but also has no strict requirements on the number of transmitting antennas or receiving antennas. At the receiving end, to detect the LD code, the channel state information must be known. In practical applications, the training mechanism is usually used to obtain channel state informat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04
CPCH04B7/0891H04B7/0669H04L1/0625
Inventor 王磊吴克颖朱孝龙
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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