Abstract
In a broadband wireless communication system a spread spectrum signal is intentionally overlapped with an OFDM signal in a time domain a frequency domain or both. The OFDM signal which inherently has a high spectral efficiency is used for carrying broadband data or control information. The spread spectrum signal which is designed to have a high spread gain for overcoming severe interference is used for facilitating system functions such as initial random access channel probing or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.
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| 4G | 28/05/2018 | ISLD-201808-005 | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD |
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