There are many key technologies about the single-user detection, such as synchronization between receiver and transmitter, channel estimation and diversity.

单用户检测中的关键技术很多，主要有接收端和发送端的同步，信道估计和分集等。

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The open loop transmit diversity scheme, named as STTD, and two feedback close loop transmit diversity schemas in downlink channel communication was defined in WCDMA standard.

WCDMA标准在下行信道传输中采用了称作STTD的开环发射分集方案和两种反馈模式的闭环发射分集方案。

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Space -time coding can increase channel capacity by using the space and time diversity technique.

空时编码技术通过空间和时间分集接收能有效增加信道容量。

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Stuart Cosgrove, director of creative diversity at Paralympic broadcaster Channel 4, says nearly two-thirds of people questioned in a poll it commissioned said the Games had shifted their attitude towards disability.

BBC: Paralympics legacy: Seize the momentum

Anecdotally at least, the evidence suggests that in the smaller markets most susceptible to monopolization, where Clear Channel has its strongest presence, diversity has actually increased as ownership consolidated.

FORBES: Free the Airwaves