Uplink channel measurement reference signal and mapping method for bandwidth range frequency domain position

The invention discloses a mapping method for uplink channel Sounding Reference Signal and the bandwidth range frequency-domain position. When the frequency-domain position of the largest SRS bandwidth is determined, the frequency-domain position of the largest SRS bandwidth and the physical random accessing channel (PRACH) of the uplink pilot time slot (UpPTS), that is, the frequency-domain position of the PRACH channel are staggered; the distance between the frequency-domain ending position of the largest SRS bandwidth and the upper boundary of the uplink system bandwidth is larger than or equal to an allocated first deviation value, and/or the distance between the frequency-domain initial position of the largest SRS bandwidth and the lower boundary of the uplink system bandwidth is larger than or equal to an allocated second deviation value. The invention has the advantages that interference to the determined frequency-domain position of an SRS signal in UpPTS does not interfere with the PRACH channel, and can avoid out-band leakage between systems.