Method for transmitting uplink signal of wide-band time-division duplex system

Abstract

The method comprises: the terminal uses a uplink time slot as a unit to send signals; under the term of 30.72MHz sampling frequency and the normal cyclic prefix, the 208 or 216 or 224 sampling point is taken as the value of the cyclic prefix; under the term of extended cyclic prefix, the 456 or 464 or 472 or 480 sampling point is taken as the value of cyclic prefix.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for transmitting an uplink signal of a broadband time division duplex system. Background technique [0002] In a TDD communication system, the shortest duration of uplink or downlink is called a time slot. A time slot usually consists of two parts: several symbols for sending data and a time slot interval for not sending data. The symbol includes the information that the system needs to send, but no data is sent in the time slot interval. Its main function is to protect the uplink and downlink conversion. The downlink time slot interval of the downlink will also affect the coverage of the cell. Generally, the larger the downlink time slot interval, the larger the coverage of the cell. [0003] However, in the broadband TDD communication system, the frequency selective fading of the channel is very significant. In order to reduce the influence of frequency selective ...

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Problems solved by technology

According to the current transmission method, the terminal needs to support four uplink time slot intervals, which will increase the implementation complexity of the terminal without bringing any gain

[0008] 2. As mentioned earlier, the main function of the uplink slot interval of the uplink time slot is the protection of the up-downlink conversion, while the main function of the downlink time slot interval of the downlink time slot is in addition to the protection of the down-uplink conversion , will also affect the coverage of the cell. Therefore, the uplink time slot interval of the uplink time slot should not be greater than the downlink time slot interval of the downlink time slot. According to 3GPP TS 36.211 V0.4.2, the downlink time slot interval of the downlink time slot is equivalent to 288 Sample points, therefore, the uplink slot interval of the uplink slot should not be greater than 288 samples, but, as mentioned above, in the case of Extend cyclic prefix, when the number of available subcarriers of the system bandwidth is less than or equal to 300 , the duration of the uplink time slot interval is equivalent to 408 samples, which is obviously a waste of resources

Moreover, according to the current transmission method, when two adjacent cells are configured with different system bandwidths, the data between different terminals will cause serious interference due to the inconsistency of the cyclic prefix lengths of the time slot symbols, which seriously affects the transmission of data by terminals. s efficiency

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