Method and apparatus for reception of long range signals in bluetooth
AssigneeIntegrated System Solution Corp.
InventorsAlbert Chen, Kuang-Ping Ma, Wen-Tso Huang
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Abstract
The invention of a method and an apparatus for reception of long transmission range Bluetooth signals impaired by multipath are disclosed. The new reception method and apparatus proposed allows to increase the transmission range for data transmission in Bluetooth. The invention proposes the use of a new FDE adapted to SC transmission without a GI or CP. The proposed FDE very successfully mitigates ISI while being very implementation-friendly.
Claims9
Apparatus for reception of long-range signals in Bluetooth for all transmission modes on power class 1, power class 2 and power class 3, the apparatus comprising:
- a first equalizer, receiving and processing first packet data;
- a first GPSK demodulator, receiving said first packet data from said first equalizer and demodulating said first packet data;
- a root-raised-cosine (RRC) filter, downsampling second packet data;
- a second equalizer, receiving and processing third packet data and fourth packet data, wherein said second equalizer has an impulse response limited by circular convolution with a rectangular window RW transformed into frequency domain
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- or by multiplication with a rectangular window rwin time domain for short FFT/IFFT size
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- a Pi/4-DQPSK demodulator, receiving said third packet data from said second equalizer and demodulating said third packet data;
- and
- an 8-DPSK demodulator, receiving fourth packet data from said second equalizer and demodulating said fourth packet data.
Dependencies are inferred from the claim text.