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Multi-carrier MISO system based on three-dimensional mutual-complementing code

A complementary code, multi-carrier technology, applied in the field of MISO system, can solve the problem of poor ability to resist multi-path interference and multi-user interference, and achieve the solution of eliminating multiple access interference and multi-path interference, reducing complexity and good practicability. Effect

Inactive Publication Date: 2012-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current MISO system has poor ability to resist multi-path interference and multi-user interference, and proposes a multi-carrier MISO system based on three-dimensional complementary codes

Method used

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  • Multi-carrier MISO system based on three-dimensional mutual-complementing code
  • Multi-carrier MISO system based on three-dimensional mutual-complementing code
  • Multi-carrier MISO system based on three-dimensional mutual-complementing code

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specific Embodiment approach 1

[0025] Specific implementation mode one: combine figure 1 Describe this embodiment, in the multi-carrier MISO system based on three-dimensional complementary codes of the present invention, user k uses a three-dimensional complementary code as a signature code, and each three-dimensional complementary code includes N T two-dimensional complementary code, for user k, its working process includes the following steps:

[0026] Step 1: At the sending end, use the transmitter of the MISO system to modulate the data to be sent into N T modulation signal, and then N T Channel modulated signal with N T The root antenna transmits to the wireless channel;

[0027] Step 2: At the receiving end, the receiver of the MISO system uses 1 antenna to receive the N transmitted to the wireless channel in step 1. T modulation signal.

[0028] The MISO system based on three-dimensional complementary codes includes k users, and each user's transmitter includes N T One transmit antenna and the ...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is a further description of the three-dimensional complementary code-based multi-carrier MISO system described in Embodiment 1.

[0030] The generation method of described three-dimensional complementary code comprises the steps:

[0031] Step 1: Use two orthogonal matrices A and B with dimensions 2×2 to construct two sequences C of length 4 1 and C 2 :

[0032] C 1 =(b 11 A 1 , b 12 A 2 )=(c 11 , c 12 , c 13 , c 14 )

[0033] C 2 =(b 21 A 1 , b 22 A 2 )=(c 21 , c 22 , c 23 , c 24 ) (1)

[0034] Among them, the expression of the orthogonal matrix A is:

[0035] A = A 1 A 2 = a 11 ...

specific Embodiment approach 3

[0091] Specific embodiment three: this embodiment is different from the three-dimensional complementary code-based multi-carrier MISO system described in specific embodiment two in that, in the generation method of the three-dimensional complementary code, the third step is repeatedly executed, each time , the length of the basic code of the constructed complementary code is extended by 2 times.

[0092] We can also extend the length of the subcode, using the sequence obtained in formula (7) instead of generating the original complementary sequence C 1 , C 2 , and then use this sequence and the orthogonal matrix D to perform an operation in formula (6) to construct a complete complementary code whose length is extended by 2 times Extending the subcode length in this way will not change the number of subcodes contained in each code. The length of the complementary code subcode generated in this way will be extended with an exponent of 2 to become 2 chip lengths, 4 chip len...

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Abstract

A multi-carrier MISO (Multiple Input, Single Output) system based on a three-dimension mutual-complementing code relates to an MISO system, and aims to solve the problem that a conventional MISO system is poor in multi-path interference resistance and multi-user interference resistance. Each user k adopts a three-dimensional mutual-complementing code as a signature code, each three-dimensional mutual-complementing code consists of NT two-dimensional mutual-complementing codes, and for each user k, the working procedures of the system comprises the steps as follows: step I, at a transmitting end, data to be sent is modulated to NT paths of modulation signals by utilizing a transmitter of the MISO system, and then the NT paths of modulation signals are transmitted to wireless signal channels via NT antennae; and steps II, at a receiving end, the transmitters of the MISO system is utilized to receive the NT paths of modulation signals transmitted to the wireless signal channels in the step I with one antenna. The system is applicable to the field of wireless communication.

Description

technical field [0001] The invention relates to a MISO system, in particular to a multi-carrier MISO system based on three-dimensional complementary codes. Background technique [0002] In 1998, SiavashM.Alamouti of Harvard University proposed a simple dual-antenna MISO (Multiple Inputs, Single Output) system to realize transmit diversity. Then VahidTarokh, Hamid Jafarkhani and A.R. Calderbank integrated the original system proposed by Alamouti into a generalized form, and the extended sending end can not only use the form of two antennas. The MISO system adopts multiple antennas at the transmitting end to realize space diversity. The advantage of this system is that it introduces a new dimension of "space", which increases the transmission rate and reduces the error probability without increasing spectrum resources or transmission power, thereby improving spectrum utilization. [0003] Space-time coding is currently a coding method commonly used in MISO systems to achieve...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/06
Inventor 陳曉華孟维晓孙思月陈星
Owner HARBIN INST OF TECH
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