Bluetooth 4.0 low-power-consumption high-precision frequency offset estimating device and method

A technology of frequency offset estimation and low power consumption, applied in multi-frequency code system, shaping network in transmitter/receiver, baseband system components, etc., can solve the problem of large estimation variance, no guarantee, no DC component, etc problem, achieve the effect of improving stability, reducing PER, and increasing accuracy

Active Publication Date: 2013-10-23
苏州开阳微电子有限公司
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AI Technical Summary

Problems solved by technology

Since the length of the preamble is relatively short (only 8 bits), the estimation variance of this frequency offset estimation method is relatively large
However, AA is an almost arbitrary 0,1 arrangement of 32 bits, which cannot be guaranteed to contain no DC components, so it is not suitable for extracting frequency offset information, and can only be used for frame synchronization detection

Method used

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  • Bluetooth 4.0 low-power-consumption high-precision frequency offset estimating device and method
  • Bluetooth 4.0 low-power-consumption high-precision frequency offset estimating device and method
  • Bluetooth 4.0 low-power-consumption high-precision frequency offset estimating device and method

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Embodiment Construction

[0034] Such as figure 1 As shown, the Bluetooth 4.0 low-power high-precision frequency offset estimation device includes a low-pass filter LPF1, a frequency discriminator FD2, a first buffer buffer5, a second buffer buffer6 and a self DC calculation module self dc calculation4, low-pass The output end of the filter LPF1 is connected to the input end of the frequency discriminator FD2, the output end of the frequency discriminator FD2 is connected to the first buffer buffer5, the output end of the first buffer buffer5 is connected to the input end of the second buffer buffer6, and the first buffer The buffer5 is also respectively connected to the input end of the frame synchronization module frame SYNC block3 and the input end of the first accumulator 7, and the output end of the first accumulator 7 is connected to the input end of the first adder 9, from the DC calculation module self dc calculation4 The output end is connected to the input end of the first adder 9, the output...

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Abstract

The invention relates to a Bluetooth 4.0 low-power-consumption high-precision frequency offset estimating device and method. A low pass filter is connected with a frequency detector. The FD is connected with a first buffer. The first buffer is connected with a second buffer and respectively connected with a frame synchronizing block and a first accumulator. The first accumulator is connected with a first summator. A self direct current calculating block is connected with the first summator. The first summator is connected with a first multiplying unit. The first multiplying unit is connected with a second summator. The second buffer is connected with a second accumulator which is connected with a second multiplying unit. The second multiplying unit is connected to the second summator. A preamble and AA are used for receiving signal frequency offset estimation and precision in estimating the signal frequency offset of the BT4.0 receiving terminal is improved.

Description

technical field [0001] The invention relates to a device and method for Bluetooth 4.0 low-power consumption and high-precision frequency offset estimation, and belongs to the technical field of wireless local area network transmission. Background technique [0002] In December 2009, the Bluetooth Special Interest Group (SIG) launched the Bluetooth 4.0 version for the first time, and at the end of 2010, it officially announced the relevant data of the Bluetooth core specification version 4.0 in Seattle. Specifications include traditional Bluetooth technology, Bluetooth low-power technology and Bluetooth high-speed technology and other three specifications combined into one. [0003] Low power consumption technology can be said to be a major breakthrough in Bluetooth 4.0 version. It has ultra-low peak (Peak), average and standby power consumption. It can be used for several years through a standard button battery and supports compatibility between various devices. And enhance...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04L27/26
Inventor 李宏
Owner 苏州开阳微电子有限公司
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