Quadrature amplitude modulation transmission system
摘要
The transmission system has the digital signals to be transmitted used to select successive multi-stage symbols from a defined complex value symbol alphabet. The selected symbols are arranged in line along a time axis, to obtain a pulse sequence weighted by the symbols, which is filtered for reducing the required bandwidth. Pref. the symbols are provided as repetitive frames, each containing a data symbol sequence and a test sequence for testing the transmission path. Pref. the symbol constellation of the symbol alphabet is defined by a circle with a centre point which is free from symbols.
申请公布号
DE19535075(A1)
申请公布日期
1996.04.25
申请号
DE19951035075
申请日期
1995.09.21
申请人
DEUTSCHE TELEKOM AG, 53175 BONN, DE;TELEFUNKEN SENDERTECHNIK GMBH, 10553 BERLIN, DE
发明人
WEBER, KLAUS, DIPL.-ING., 13357 BERLIN, DE;BRAKEMEIER, ACHIM, DIPL.-ING. DR., 89134 BLAUSTEIN, DE;RUDOLPH, DIETMAR, PROF. DIPL.-ING. DR., 14163 BERLIN, DE
