Data modulating and demodulating method as well as frequency spectrum management method, device and system

A spectrum management and spectrum technology, applied in the field of communication, can solve the problems of not being able to notify LTE receiving terminals, demodulation errors, and not being able to know the pre-filtering operation, so as to improve demodulation efficiency and realize the effect of transparent transmission

Active Publication Date: 2012-02-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the research and practice of the prior art, the inventors of the present invention found that the LTE transmitting terminal performs a pre-filtering operation on the baseband signal, but the pre-filtering operation cannot be notified to the LTE receiving terminal, and the receiving terminal cannot know that the pre-filtering operation will lead large demodulation error

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  • Data modulating and demodulating method as well as frequency spectrum management method, device and system
  • Data modulating and demodulating method as well as frequency spectrum management method, device and system
  • Data modulating and demodulating method as well as frequency spectrum management method, device and system

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Embodiment 1

[0055] The basic flow of the spectrum management method in the first embodiment of the present invention can be referred to figure 2 , the method of this embodiment is:

[0056] Step 101, acquiring a target frequency band allocated for a transmitting terminal.

[0057] The CPC network can perceive the spectrum usage of the current radio scene by itself, and allocate the idle frequency band as the target frequency band to the transmitting terminal; the CPC network can also receive the usage of the radio scene perceived by the transmitting terminal, and determine the target frequency band accordingly.

[0058] Step 102, according to the codebook corresponding to the radio scene and the target frequency band, calculate the precoding codeword index for spectrum shaping.

[0059] Specifically, the codebook corresponding to the radio scene is a predefined standard parameter, which includes a codeword index and a corresponding return-to-zero subcarrier sequence, and each codeword c...

Embodiment 2

[0066] For ease of understanding, the spectrum shaping signaling method in the embodiment of the present invention will be described in detail below. This embodiment takes the master-slave mode as an example for illustration, wherein the master-slave mode uses the CPC network as the spectrum management device, and the spectrum of the cognitive radio Use conditions, and determine and allocate idle target frequency bands to the transmitting terminal and receiving terminal of the LTE system. see Figure 5 , the second embodiment of the spectrum management method in the embodiment of the present invention includes:

[0067] In step 201, the CPC network perceives the spectrum usage of the current radio scene and estimates the current noise level.

[0068] Perceive the spectrum usage of the current radio scene, and dynamically estimate and measure the acceptable interference level of the main system.

[0069] In step 202, the CPC network obtains the specific location of the free f...

Embodiment 3

[0078] The following describes the spectrum shaping signaling method in the embodiment of the present invention in detail. This embodiment takes the on-demand mode as an example. The on-demand mode is that the LTE system perceives the spectrum usage of the radio, determines the target frequency band, and sends the signal to the CPC network. (Spectrum management device) Request a target frequency band. see Figure 6 , the second embodiment of the spectrum management method in the embodiment of the present invention includes:

[0079] Step 301, the CPC network receives the spectrum usage and noise level of the current radio scene sensed by the LTE system, and the frequency band requested by LTE and the codebook corresponding to the radio scene, so as to obtain the allocated target frequency band, which is the frequency band requested by LTE.

[0080] In step 302, the CPC network sends the codebook requested by the LTE system to the LTE system.

[0081] In step 303, the CPC net...

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Abstract

The invention discloses a data modulating and demodulating method as well as a frequency spectrum management method, device and system. The frequency spectrum management method comprises the following steps of: acquiring a target frequency band allocated for a transmitting terminal; calculating a precoded codeword index formed by a frequency spectrum according to a codebook corresponding to a current radio scene and the target frequency band, wherein the codeword index corresponds to a zero return sub carrier sequence which is used for calculating a precoding vector for modulating data; and broadcasting and transmitting the precoded codeword index. By implementing the embodiment of the invention, a receiving terminal can be used for knowing pre-filtering operation of the transmitting terminal according to the pre-coded codeword index; and the data are demodulated according to the precoding vector, and thus transparent transmission from the transmitting terminal to the receiving terminal is realized and the demodulation efficiency is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a data modulation and demodulation method, a spectrum management method, a device and a system. Background technique [0002] With the development of communication technology, cognitive radio has attracted more and more attention. Cognitive radio is characterized by flexibility, intelligence, and reconfigurability. Change some operating parameters (such as transmission power, carrier frequency and modulation technology, etc.) to adapt its internal state to the statistical changes of the received wireless signal, so as to achieve high-reliability communication at any time and any place and limited to heterogeneous network environments efficient use of wireless spectrum resources. The core idea of ​​cognitive radio is to realize dynamic spectrum allocation and spectrum sharing through spectrum sensing and intelligent learning capabilities of the system. [0003] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W16/02H04W24/00
CPCH04L5/0092H04L5/005H04B1/62H04L25/03343H04L25/08H04L27/0006H04L5/0007H04W72/042H04L5/0032H04W72/00H04L25/03898H04W48/08H04L2025/03414
Inventor 孙国林伽勃·凡·德·比克
Owner HUAWEI TECH CO LTD
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