Method and apparatus for processing communication signal

Abstract

The present invention provides an apparatus used for processing the communication signal, wherein the burst packet in a communication signal comprises an access code. The apparatus comprises the following components: a differential phase detector which is used for leading out the differential phase signal that indicates a plurality of differential phases of the first group of the access code in the communication signal; and a frequency offset estimator which is coupled to the differtial phase detector and is used for comparing the differential phase signal and the ideal differential phase signal for calculating the frequency offset value. The method and the apparatus for processing communication signal according to the invention can reduce the interference effect in the packet detection operation and increase the performance of a frequency offset estimating system.

Description

technical field

[0001] The present invention relates to signal processing in communication systems, in particular to a method and system for receiving communication signals and detecting burst packets for synchronizing packet transmission. Background technique

[0002] In a wireless communication standard such as bluetooth, a burst of packets is transmitted to its receiver, and the receiver is operated to check the packet type and detect the timing and frequency of incoming packets. There is usually a large frequency offset (offset) between the local side and the remote side, and the receiver should be able to remove the frequency offset to avoid misinterpreting a binary "0" as Binary "1" and vice versa. Please refer to figure 1 , figure 1 It is a schematic diagram illustrating an example of a frequency deviation (deviation) of a Gaussian Frequency Shift Keying (GFSK) modulated signal. like figure 1 As shown, the curve CV1 represents the signal at the transmitter side, ...

Examples

Embodiment Construction

[0015] Certain terms are used in the description and claims to refer to particular components. It should be understood by those skilled in the art that manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. The "comprising" mentioned in the entire specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0016] Please refer to image 3 . image 3 Shown is ...

technical field

[0001] The present invention relates to signal processing in communication systems, in particular to a method and system for receiving communication signals and detecting burst packets for synchronizing packet transmission. Background technique

[0002] In a wireless communication standard such as bluetooth, a burst of packets is transmitted to its receiver, and the receiver is operated to check the packet type and detect the timing and frequency of incoming packets. There is usually a large frequency offset (offset) between the local side and the remote side, and the receiver should be able to remove the frequency offset to avoid misinterpreting a binary "0" as Binary "1" and vice versa. Please refer to figure 1 , figure 1 It is a schematic diagram illustrating an example of a frequency deviation (deviation) of a Gaussian Frequency Shift Keying (GFSK) modulated signal. like figure 1 As shown, the curve CV1 represents the signal at the transmitter side, ...

Examples

Embodiment Construction

[0015] Certain terms are used in the description and claims to refer to particular components. It should be understood by those skilled in the art that manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. The "comprising" mentioned in the entire specification and subsequent claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0016] Please refer to image 3 . image 3 Shown is ...

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