摘要： 分析了蓝牙2.0+EDR新规范π/4-DQPSK与8DPSK调制方式在加性高斯白噪声信道(AWGN)下的比特错误率与平均接收信噪比的关系，推导了ACL数据分组的广播重传概率与平均接收信噪比的函数表达式，提出了蓝牙2.0+EDR广播数据分组在加性高斯白噪声信道下的自适应分组选择策略，即通过在不同的信噪比下选择不同的分组类型进行传输以得到最少的广播重传次数和最大的传输吞吐量。仿真结果为在不同信道条件下取得最好的广播效果提供了参考。
关键词:
蓝牙广播,
加性高斯白噪声信道,
信噪比,
数据传输吞吐量
Abstract: Relations between bit error rate (BER) and average received signal-to-noise ratio(SNR) in AWGN channel are derived for π/4-DQPSK and 8DPSK modulations modes in Bluetooth 2.0+EDR specification. Function expressions of packet broadcasting retransmission probability and average received SNR of ACL data packets are put forward. The adaptive packet selection policy is presented for the Bluetooth 2.0+EDR specification packets in different SNRs, which selects proper packet in different SNRs to get the least retransmission times and the maximal broadcasting throughput. Simulation results can be used to achieve a good broadcast performance in different channel conditions.
Key words:
Bluetooth broadcast,
AWGN channel,
signal-to-noise ratio,
data transmission throughput
中图分类号:
徐 飞;庄奕琪;郭 锋. 提高蓝牙广播性能的自适应分组选择策略[J]. 计算机工程, 2007, 33(19): 39-41.
XU Fei; ZHUANG Yi-qi; GUO Feng. Adaptive Packet Selection Strategy for Broadcast Performance of Bluetooth Improvement[J]. Computer Engineering, 2007, 33(19): 39-41.