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Complex modulation based FBMC signal sending and receiving methods and devices thereof

A complex signal and signal transmission technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of inter-carrier interference and achieve effective utilization

Inactive Publication Date: 2017-01-04
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a method for sending and receiving FBMC signals based on complex number modulation, so as to solve the problem of inter-carrier interference faced when the FBMC modulation method is applied in a wireless communication system

Method used

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  • Complex modulation based FBMC signal sending and receiving methods and devices thereof
  • Complex modulation based FBMC signal sending and receiving methods and devices thereof
  • Complex modulation based FBMC signal sending and receiving methods and devices thereof

Examples

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Embodiment 1

[0060] In this embodiment, how to use the method proposed in this application to solve the interference problem in the complex FBMC system will be described in detail. This embodiment presents a method based on specific filter parameters, but the method can be extended to any other filter parameters.

[0061] Table 1 is the intercarrier interference coefficient in the OQAM system using the PHYDYAS filter.

[0062]

[0063] Table 1

[0064] It should be noted that every two columns of data in Table 1 represent an interval of τ 0 The interference between two OQAM signals of / 2. In this application, since the system uses the period τ 0 The complex signal (QAM), the corresponding intercarrier interference coefficient can be expressed by Table 2.

[0065]

[0066] Table 2: Illustration of QAM-FBMC system interference using PHYDYAS filter

[0067] As shown in Table 2, a carrier only interferes with the upper and lower adjacent carriers of the same symbol and the adjacent ...

Embodiment 2

[0090] In this embodiment we give some examples of power allocation.

[0091] In formula (6), each element of the diagonal matrix Σ adjusts the power of the signal on each subcarrier. Therefore a straightforward power allocation principle is to normalize the power of all received signals, that is, using HΣ -1 Precode the signal. This method can effectively obtain consistent received signal strength, but due to Σ -1 contains high-energy components, this power allocation principle will lead to an increase in transmit power.

[0092] Another power distribution principle is power distribution based on the water injection principle. However, in the case of limited transmit power, the power allocation based on the water-filling principle will lead to a higher bit error rate on some carriers. Therefore, a more feasible approach is to avoid signaling on inefficient carriers. For example, suppose Σ=diag(Σ 1 ,Σ 2 ,...,Σ 12 ), and Σ 1 ≥Σ 2 ...≥Σ 12 , then the precoding matrix ...

Embodiment 3

[0095] This embodiment illustrates how to use the method of this application to implement Alamouti coding transmission in the FBMC system. Assuming that the system is a 2*1 MIMO system, on antenna port #1, an even number of QAM signals a=[a 1 ,a 2,..., a n ] is first precoded to get: y 1 =Σ -1 Ha, then modulated by FBMC and sent on antenna port #1. On antenna port #2, Obtained by precoding: y 2 =Σ -1 Hb, then modulating y by FBMC 2 and send.

[0096] At the receiving end, first perform FBMC demodulation on the received signal on the receiving antenna to obtain Y and then use W respectively H Perform post-processing and use the zero-forcing rule to eliminate ISI interference, and obtain the post-processing signal: Q=[Q 1 ,Q 2 ,...,Q n ], and perform Alamouti decoding according to Q.

[0097] Corresponding to the above method, the present application provides a transmitter whose composition structure is as follows Figure 5 As shown, the transmitter includes: a pr...

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Abstract

The invention discloses a complex modulation based FBMC signal sending method. The method is characterized by comprising that a complex signal a is pre-coded to obtain X=Ta, and T represents a precoding matrix, and serves as conjugated transposition of a right singular-value matrix of an interference matrix I; and an FBMC based modulation manner is used to send X. The invention also discloses a corresponding complex modulation based FBMC signal receiving device, an emitter and a receiver. The problem that inter-carrier interference occurs when the FBMC modulation manner is applied to a radio communication system is solved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method and device for transmitting and receiving multi-carrier (FBMC) signals based on a filter bank of complex modulation. Background technique [0002] With the rapid development of the information industry, especially the growing demand from the mobile Internet and the Internet of Things (IoT, internet of things), it brings unprecedented challenges to future mobile communication technologies. For example, according to the report ITU-R M.[IMT.BEYOND 2020.TRAFFIC] of the International Telecommunication Union ITU, it can be predicted that by 2020, the growth of mobile traffic will increase by nearly 1,000 times compared to 2010 (4G era), and the number of user equipment connections will also increase. It will exceed 17 billion. As massive IoT devices gradually penetrate into mobile communication networks, the number of connected devices will become ...

Claims

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Application Information

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IPC IPC(8): H04L27/36H04L27/38
CPCH04L27/362H04L27/3809
Inventor 孙鹏飞朱大琳喻斌
Owner BEIJING SAMSUNG TELECOM R&D CENT
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