However, when one CAZAC sequence is always used depending on {HEAD ~ the frequency bandwidth} in {TAIL ~ each cell}, any occurrence of a poor combination of the frequency bandwidth with the interfering cell may lead to continuously large interference in all frames, causing a large reduction in the communications quality 
However , when one CAZAC sequence is always used depending on { HEAD ~ the frequency bandwidth } in { TAIL ~ each cell } , any occurrence of a poor combination of the frequency bandwidth with the interfering cell may lead to continuously large interference in all frames , causing a large reduction in the communications quality
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH