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Frequency-mode-null state multi-dimensional hybrid modulation wireless communication signal method

A mixed modulation and wireless communication technology, applied in the field of communication, can solve problems such as subcarrier interference, communication rate limitation, mapping complexity, and large detection complexity at the receiving end, so as to reduce the detection complexity and increase the attainable rate.

Active Publication Date: 2019-11-26
XIDIAN UNIV
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Problems solved by technology

The shortcomings of this method are: the transmitter needs multiple radio frequency chains to transmit signals, and if a higher communication rate is to be achieved, the terminal must install a large number of antennas, which is impractical in practice, making the communication rate strict. Limited by the number of antennas at the transmitter
The disadvantage of this method is that as the number of antennas and carriers increases, the complexity of mapping from binary bit streams to activated antennas and carriers at the transmitting end and the detection complexity at the receiving end will be very large
The disadvantage of this method is that the non-orthogonality between subcarriers will cause interference between subcarriers, resulting in a decrease in the detection performance of the received signal, so the bit error rate is relatively high

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  • Frequency-mode-null state multi-dimensional hybrid modulation wireless communication signal method
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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] refer to figure 1 , to further describe the implementation steps of the method of the present invention for completing the frequency-mode-null state multi-dimensional mixed modulation wireless communication signal.

[0033] Step 1, divide the binary bit stream signal input by the transmitter into blocks.

[0034] The signal processor at the transmitting end divides the input binary bit stream sequence into blocks according to the total number of transmitting antennas, the total number of orbital angular momentum modes, the total number of subcarriers and the order of constellation modulation to obtain multiple binary bit stream sequences.

[0035] In the first step, calculate the number of binary bits in each block according to the following formula:

[0036]

[0037] Among them, R bIndicates the number of binary bits in the b-th block, Indicates the rou...

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Abstract

The invention discloses a frequency-modal-empty state multi-dimensional hybrid wireless communication signal modulation method for further improving communication achievable rate. The method comprisesthe specific steps as follows: (1) binary bit stream blocking; (2) constellation modulating and mapping; (3) subcarrier, orbit angle momentum modal modulating; and (4) signal transmitting after spacemodulation. By using a three-dimensional modulation space formed by a transmitting antenna, the orbit angle momentum modal and the sub-carrier, three additional modulation dimensions are provided forthe traditional modulation method, the advantages of being low in system computing complexity and high in communication achievable rate are provided; and the communication achievable rate can be greatly improved even if the antenna number at the transmitting end is small.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to a frequency-mode-null state in the technical field of wireless communication MIMO-OFDM (Multiple-Input-Multiple-Output orthogonal frequency division multiplexing) Multidimensional hybrid modulation wireless communication signal method. The present invention can be used for multi-dimensional modulation of wireless communication signals in the future wireless mobile communication in addition to the three-dimensional modulation space composed of frequency-mode-null state and the two-dimensional modulation space in the traditional constellation diagram, thereby improving the communication system. Achievable rate and spectral efficiency. Background technique [0002] As the signal bandwidth in wireless communication becomes wider and wider, the corresponding spectrum resources are less and less. People gradually begin to study algorithms and technologies that can ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/36H04L27/34H04L27/32
CPCH04L27/32H04L27/3483H04L27/362
Inventor 刘毅程维刘亚博喻丹阳秦凡张海林
Owner XIDIAN UNIV
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