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

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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

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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Example Embodiment

[0059] Example one:

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

[0061] Table 1 shows the inter-carrier interference coefficients in the OQAM system using PHYDYAS filters.

[0062]

[0063] Table 1

[0064] It should be noted that the interval between every two columns of data in Table 1 is τ 0 / 2 interference between two OQAM signals. In this application, since the system uses the period τ 0 For the complex signal (QAM), the corresponding inter-carrier interference coefficient can be shown in Table 2.

[0065]

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

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

Example Embodiment

[0089] Example two:

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

[0091] In formula (6), each element of the diagonal matrix Σ adjusts the power of the signal on each subcarrier. Therefore, a direct power allocation principle is to normalize the power of all received signals, that is, use 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 transmission power.

[0092] Another power distribution principle is power distribution based on the principle of water injection. However, in the case of limited transmission power, power allocation based on the principle of water injection will result in a higher bit error rate on some carriers. Therefore, a more feasible method is to avoid signal transmission on inefficient carriers. For example, suppose Σ=diag(Σ 1 ,Σ 2 ,..., Σ 12 ), and Σ 1 ≥Σ 2 ...≥Σ 12 , Th...

Example Embodiment

[0094] Embodiment three:

[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 ] First get precoded: y 1 = Σ -1 Ha, then modulated by FBMC and sent a signal on antenna port #1. On antenna port #2, Obtained by precoding: y 2 = Σ -1 Hb, then modulate y through FBMC 2 And send.

[0096] At the receiving end, first perform FBMC demodulation of 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 get the post-processing signal: Q=[Q 1 ,Q 2 ,...,Q n ], and perform Alamouti decoding according to Q.

[0097] Corresponding to the above method, this application provides a transmitter with a composition structure such as 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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