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Method and device for estimating TOA

An estimated value and channel estimation technology, applied in the field of communication, can solve problems such as inaccurate TOA estimation, and achieve the effect of accurate energy estimation and fixed-point error insensitivity

Active Publication Date: 2009-07-29
HUAWEI DEVICE CO LTD
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Problems solved by technology

[0020] The embodiment of the present invention provides a TOA estimation method and device to solve the defect of inaccurate TOA estimation caused by the deviation of energy estimation caused by interference in the existing strong interference wireless environment, thereby realizing the work in a strong interference environment The TOA estimation scheme for

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  • Method and device for estimating TOA

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Embodiment Construction

[0032] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0033] Figure 4 It is a schematic diagram of a TOA estimation method according to an embodiment of the present invention. Such as Figure 4 As shown, the TOA estimation method of the embodiment of the present invention includes:

[0034] Step 101, after performing interference cancellation on multiple single paths, directly add the interference cancellation results of the multiple single paths, perform channel estimation according to the NB after interference cancellation and local training sequence, and generate a channel estimation value.

[0035] Step 102, perform TOA estimation according to the channel estimation value, and adjust the synchronization position of the current NB according to the TOA estimation result.

[0036] The embodiment of the present invention overcomes the defect that the deviation of ener...

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Abstract

The invention relates to a TOA estimate method and apparatus thereof. The method comprises: performing channel estimation according to interference eliminated NB and local training sequence, and generating a channel estimation value; performing TOA estimation according to the channel estimation value, and adjusting the synchronous position of the current NB according to the TOA estimation result. By eliminating interference to signal before TOA estimation, the embodiment of the invention avoids the energy estimation deviation, which influences the TOA estimation, caused by interference in the existing intensive interference wireless environment. The technical solution in the embodiment of the invention can achieve more accurate energy estimation in intensive interference wireless environment, and needs not to adjust the searching window adjustment method.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a TOA estimation method and device. Background technique [0002] In the demodulation of the Global System for Mobile Communications (GSM for short), synchronous tracking is divided into frequency tracking and time slot head position tracking. The coarse synchronization of the frequency head position uses Frequency Burst (FB for short), and the coarse synchronization of the slot head position uses Synchronization Burst (SB for short), and when the frequency is locked and the synchronization position is searched, Work on these two parts stopped. In order to track multipath changes in subsequent normal burst (Normal Burst, NB for short) demodulation, it is necessary to perform symbol-level synchronization using the training sequence of the NB in ​​units of time slots. [0003] figure 1 Schematic for existing sync position adjustments. Such as figure 1 As mentioned above, ...

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Application Information

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IPC IPC(8): H04W24/00H04B17/00
CPCG01S5/0215H04W56/0075G01S5/0221H04W56/0085G01S5/0218
Inventor 吴更石李峰彭念黄抒帆杨靖
Owner HUAWEI DEVICE CO LTD
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