Signal detection apparatus and method, and filter-bank multi-carrier system

Abstract

The embodiment of the invention provides a signal detection apparatus and method, and a filter-bank multi-carrier system. The signal detection method comprises: Fourier transform and dispreading are carried out on a received multi-carrier symbol; on the basis of an inter-symbol correlation matrix, non-linear inter-symbol interference cancellation is carried out on the symbol; linear inter-carrier interference cancellation is carried out on the symbol based on an inter-carrier correlation matrix; and the symbol after the inter-symbol interference cancellation and the inter-carrier interference cancellation is demodulated. Therefore, even though a QAM manner is employed at a sending terminal, the signal can be transmitted in an FBMC system without the need to change a prototype filter of the FBMC sending terminal, so that the original power spectrum side-lobe property of the FBMC is kept to the greatest extent.

Description

technical field

[0001] Embodiments of the present invention relate to the technical field of multi-carrier communication, and in particular, to a signal detection device, method, and Filter-Bank Multi-Carrier (FBMC, Filter-Bank MultiCarrier) system. Background technique

[0002] FBMC has lower power density spectrum sidelobes than Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing). However, FBMC can only be combined with real-valued or imaginary-valued modulation techniques, such as pulse amplitude modulation (PAM, pulse amplitude modulation) or differential quadrature amplitude modulation (OQAM, offset Quadrature Amplitude Modulation); because FBMC is only in the real number domain or imaginary number The domain is orthogonal, and it is not orthogonal in the complex domain, which limits the application of FBMC.

[0003] For example, the channel estimation of FBMC is particularly complicated in the multipath fading channel environm...

Examples

Embodiment 1

[0036] An embodiment of the present invention provides a signal detection device configured in an FBMC system; the signal detection device may be configured at a receiving end of the FBMC system.

[0037] figure 1 is a schematic diagram of a signal detection device according to an embodiment of the present invention, such as figure 1 As shown, the signal detection device 100 includes:

[0038] A signal processing unit 101, which performs Fourier transform and despreading of the received multi-carrier symbols;

[0039] An interference elimination unit 102, which performs non-linear intersymbol interference elimination on symbols based on an intersymbol correlation matrix;

[0040] A linear equalization unit 103, which performs linear inter-carrier interference cancellation on symbols based on the inter-carrier correlation matrix; and

[0041] The demodulation unit 104, which demodulates the symbols after the inter-symbol interference cancellation and the inter-carrier interf...

Embodiment 2

[0113] An embodiment of the present invention provides a signal detection method, which is applied to an FBMC system. The content of the embodiment of the present invention that is the same as that of embodiment 1 will not be repeated here.

[0114] Figure 6 is a schematic diagram of a signal detection method in an embodiment of the present invention, such as Figure 6 As shown, the signal detection method includes:

[0115] Step 601, performing Fourier transform and despreading on the received multi-carrier symbols;

[0116] Step 602, performing non-linear inter-symbol interference cancellation on the symbols based on the inter-symbol correlation matrix;

[0117] Step 603, performing linear inter-carrier interference cancellation on symbols based on the inter-carrier correlation matrix; and

[0118] Step 604, demodulate the symbols after the inter-symbol interference cancellation and the inter-carrier interference cancellation.

[0119] In this embodiment, the inter-sym...

Embodiment 3

[0131] An embodiment of the present invention provides an FBMC system, and the same content as that in Embodiment 1 or 2 will not be repeated here.

[0132] Figure 8 is a schematic diagram of the FBMC system of the embodiment of the present invention, such as Figure 8 As shown, the FBMC system 800 includes: a transmitting end 801 and a receiving end 802; wherein the transmitting end 801 uses the FBMC prototype filter to generate and transmit a multi-carrier signal, and can refer to related technologies; the receiving end 802 is configured with the signal as described in Embodiment 1 Detection device 100.

[0133] The embodiment of the present invention also provides a receiver.

[0134] Figure 9 is a schematic diagram of a receiver according to an embodiment of the present invention. Such as Figure 9 As shown, the receiver 900 may include: a central processing unit (CPU) 901 and a memory 110; the memory 110 is coupled to the central processing unit 901. Among them, t...

technical field

[0001] Embodiments of the present invention relate to the technical field of multi-carrier communication, and in particular, to a signal detection device, method, and Filter-Bank Multi-Carrier (FBMC, Filter-Bank MultiCarrier) system. Background technique

[0002] FBMC has lower power density spectrum sidelobes than Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing). However, FBMC can only be combined with real-valued or imaginary-valued modulation techniques, such as pulse amplitude modulation (PAM, pulse amplitude modulation) or differential quadrature amplitude modulation (OQAM, offset Quadrature Amplitude Modulation); because FBMC is only in the real number domain or imaginary number The domain is orthogonal, and it is not orthogonal in the complex domain, which limits the application of FBMC.

[0003] For example, the channel estimation of FBMC is particularly complicated in the multipath fading channel environm...

Examples

Embodiment 1

[0036] An embodiment of the present invention provides a signal detection device configured in an FBMC system; the signal detection device may be configured at a receiving end of the FBMC system.

[0037] figure 1 is a schematic diagram of a signal detection device according to an embodiment of the present invention, such as figure 1 As shown, the signal detection device 100 includes:

[0038] A signal processing unit 101, which performs Fourier transform and despreading of the received multi-carrier symbols;

[0039] An interference elimination unit 102, which performs non-linear intersymbol interference elimination on symbols based on an intersymbol correlation matrix;

[0040] A linear equalization unit 103, which performs linear inter-carrier interference cancellation on symbols based on the inter-carrier correlation matrix; and

[0041] The demodulation unit 104, which demodulates the symbols after the inter-symbol interference cancellation and the inter-carrier interf...

Embodiment 2

[0113] An embodiment of the present invention provides a signal detection method, which is applied to an FBMC system. The content of the embodiment of the present invention that is the same as that of embodiment 1 will not be repeated here.

[0114] Figure 6 is a schematic diagram of a signal detection method in an embodiment of the present invention, such as Figure 6 As shown, the signal detection method includes:

[0115] Step 601, performing Fourier transform and despreading on the received multi-carrier symbols;

[0116] Step 602, performing non-linear inter-symbol interference cancellation on the symbols based on the inter-symbol correlation matrix;

[0117] Step 603, performing linear inter-carrier interference cancellation on symbols based on the inter-carrier correlation matrix; and

[0118] Step 604, demodulate the symbols after the inter-symbol interference cancellation and the inter-carrier interference cancellation.

[0119] In this embodiment, the inter-sym...

Embodiment 3

[0131] An embodiment of the present invention provides an FBMC system, and the same content as that in Embodiment 1 or 2 will not be repeated here.

[0132] Figure 8 is a schematic diagram of the FBMC system of the embodiment of the present invention, such as Figure 8 As shown, the FBMC system 800 includes: a transmitting end 801 and a receiving end 802; wherein the transmitting end 801 uses the FBMC prototype filter to generate and transmit a multi-carrier signal, and can refer to related technologies; the receiving end 802 is configured with the signal as described in Embodiment 1 Detection device 100.

[0133] The embodiment of the present invention also provides a receiver.

[0134] Figure 9 is a schematic diagram of a receiver according to an embodiment of the present invention. Such as Figure 9 As shown, the receiver 900 may include: a central processing unit (CPU) 901 and a memory 110; the memory 110 is coupled to the central processing unit 901. Among them, t...

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