Comprehensive channel identifying and symbol synchronizing method


Application Number: 00107549
Application Date: 2000.05.18
Publication Number: 1325190
Publication Date: 2001.12.05
Priority Information:
International: H04B3/50
Applicant(s) Name: Huawei Techn Co., Ltd.
Address:
Inventor(s) Name: Hu Junling
Patent Agency Code: 11127
Patent Agent: han piaoyang
Abstract The present invention relates to a method for integrally solving channel identification and symbol synchronization problem in DMT or COFDM modutation and demodulation system, said method can be implemented by using energy decision criterion, including: obtaining channel frequency domain response Hi(k) with synchronous deviation delta t; obtaining channel time-domain impulse response hi (t); using length of cyclic prefix as time window length, in hi (t) making cyclic search to find window energy maximum position and defining its starting point as position of symbol synchronization; making hi (t) implement cyclic shift to obtain the channel impulse respose h(t) regulated by symbol synchronization; making Hi(k) implement linear phase rotation to obtain channel frequency domain H(k) regulated by symbol sychronization; resolving reciprocal value of H(k) to obtain tapping coefficient Q(k) of frequency domain equalizer.