Bluetooth signal receiving method and device using improved carrier frequency offset compensation
First Claim
1. A Bluetooth signal receiving device comprising:
- a frequency shift demodulator circuit configured to;
generate a baseband signal by performing frequency shift demodulation on a received signal; and
generate a frequency proportion signal having a value proportional to a frequency of the baseband signal;
a digital sampler circuit configured to generate a plurality of series of bit streams, sampled in a digital domain at a preset time interval, from the frequency proportion signal, wherein at least one of the received signal, the baseband signal, and the frequency proportion signal is converted from an analog domain to the digital domain;
a training bit pattern discriminator circuit configured to determine whether the plurality of series of bit streams generated by the digital sampler circuit satisfies a training bit pattern condition; and
a frequency offset compensation circuit configured to compensate the frequency proportion signal by using a measured error metric as an effective error metric when the plurality of series of bit streams satisfies the training bit pattern condition.
1 Assignment
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Accused Products
Abstract
Disclosed herein are a Bluetooth signal receiving device and method. The Bluetooth signal receiving device includes a frequency shift demodulator circuit, a sampler circuit, a training bit pattern discriminator circuit, and a frequency offset compensation circuit. The frequency shift demodulator circuit generates a baseband signal by performing frequency shift demodulation on a received signal, and generates a frequency proportion signal having a value proportional to the frequency of the baseband signal. The sampler circuit generates a plurality of series of bit streams from the frequency proportion signal. The training bit pattern discriminator circuit determines whether the plurality of series of bit streams generated by the sampler circuit satisfies a training bit pattern condition. The frequency offset compensation circuit compensates the frequency proportion signal by using a measured error metric as a effective error metric when the plurality of series of bit streams satisfies the training bit pattern condition.
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Citations
15 Claims
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1. A Bluetooth signal receiving device comprising:
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a frequency shift demodulator circuit configured to; generate a baseband signal by performing frequency shift demodulation on a received signal; and generate a frequency proportion signal having a value proportional to a frequency of the baseband signal; a digital sampler circuit configured to generate a plurality of series of bit streams, sampled in a digital domain at a preset time interval, from the frequency proportion signal, wherein at least one of the received signal, the baseband signal, and the frequency proportion signal is converted from an analog domain to the digital domain; a training bit pattern discriminator circuit configured to determine whether the plurality of series of bit streams generated by the digital sampler circuit satisfies a training bit pattern condition; and a frequency offset compensation circuit configured to compensate the frequency proportion signal by using a measured error metric as an effective error metric when the plurality of series of bit streams satisfies the training bit pattern condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A Bluetooth signal receiving method comprising:
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generating a baseband signal by performing frequency shift demodulation on a received signal; generating a frequency proportion signal having a value proportional to a frequency of the baseband signal; generating a plurality of series of bit streams, sampled in a digital domain at a preset time interval, from the frequency proportion signal, wherein at least one of the received signal, the baseband signal, and the frequency proportion signal is converted from an analog domain to the digital domain; determining whether the plurality of series of bit streams generated in the digital domain satisfies a training bit pattern condition; and compensating the frequency proportion signal by using a measured error metric as an effective error metric when the plurality of series of bit streams satisfies the training bit pattern condition. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification