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CC1310灵敏度测试的BER与PER

Other Parts Discussed in Thread: CC1310

你好!

关于CC1310的灵敏度测试,我有如下问题想咨询,如下

问题1:在4Mbps,8FSK,868MHz,Packet_length=1024 bytes的条件下,之前在TI的英文论坛咨询过,TI的工程师回复说PER和BER之间有如下公式

PER=1-(1-BER)^packet_length

BER = 1 - e^((ln(1 - PER))/N)

按照此公式,当BER=0.01时,PER=100%(不能工作),而我司实测PER=1%的Sensitivity=-82dBm?该如何解释这种现象?

问题2:在测试接收灵敏度时,在4Mbps,8FSK,868MHz,Packet_length=1024 bytes的条件下,当TX端发送的内容为有规律的内容(如为全0或全1),则sensitivity为-82dBm,接近手册的宣称值-82dBm,而当TX端发送的内容为随机数,即使不增加任何衰减,PER仍至少为2-3%。该如何解释这种现象?