Patent ID: 7978593

Claim:
A method for transmitting control information to instruct operation of a receiver, the method being used in a OFDM-based multi-carrier digital broadcasting system, wherein the method comprises the following steps: forming the control information at a transmitting terminal based on the working status of the transmitting terminal of the system and encoding the control information; generating an OFDM symbol using a sequence of sub-carriers, wherein the sequence of sub-carriers include a plurality of continuous pilot signals, service load signals, and other pilot signals, wherein the plurality of continuous pilot signals are located at predetermined positions in the sequence of sub-carriers; mapping the encoded control information to the plurality of continuous pilot signals in the OFDM symbol; performing frequency-time domain transform to the OFDM symbol to obtain a time-domain sampling signal and transmitting to the receiving terminal of the system; receiving the time-domain sampling signal transmitted from the transmitting terminal at the receiving terminal of the system and performing the time-frequency domain transformation to obtain the OFDM symbol; obtaining control information from valid sub-carriers of the OFDM symbol and decoding the control information; and extracting each working information from the decoded control information and instructing the receiver at the receiving terminal to perform corresponding receive processing based on each of the extracted working information, wherein the control information is transmitted by mapping it onto the continuous pilots via repetitive encoding mode in the step of forming the control information and encoding thereof at the transmitting terminal, and wherein the OFDM symbol has 3076 sub-carriers and 82 of which are the plurality of continuous pilot signals, which are located at 0th, 22nd, 78th, 92nd, 168th, 174th, 244th, 274th, 278th, 344th, 382nd, 424th, 42 6th, 496th, 500th, 564th, 608th, 650th, 688th, 712th, 740th, 772nd, 846th, 848th, 932nd, 942nd, 950th, 980th, 1012th, 1066th, 1126th, 1158th, 1214th, 1244th, 1276th, 1280th, 1326th, 1378th, 1408th, 1508th, 1537th, 1538th, 1566th, 1666th, 1736th, 1748th, 1794th, 1798th, 1830th, 1860th, 1916th, 1948th, 2008th, 2062nd, 2094th, 2124th, 2132nd, 2142nd, 2226th, 2228th, 2302nd, 2334th, 2362nd, 2386th, 2424th, 246th6,2510th, 2574th, 2578th, 2648th, 2650th, 2692nd, 2730th, 2796th, 2800th, 2830th, 2900th, 2906th, 2982nd, 2996th, 3052nd, 3075th positions of the sequence of sub-carriers respectively.