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For example, 802.11 and 802.11-fh products are not interoperable with 802.11-ds products, and vice versa.
例如，802.11和802.11 - FH产品不能与802.11 - DS产品协同工作，反之亦然。
There are several difficult problems in the research of spread spectrum FH/DS system.
在研制扩展频谱FH/DS系统时，会遇到一些很困难的问题。
The BER formula is derived when a DS spread spectrum signal bandwidth is equal to the FH slot spacing.
推导了在直接序列扩频信号带宽等于跳频频隙间隔时系统的误码率公式。
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