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1. 发明授权

EP2837116B1 RECEIVER 有权
公开(公告)号：EP2837116B1
公开(公告)日：2018-07-04
申请号：EP13717828.1
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04H40/18
CPC分类号： H04H20/22
摘要： A broadcast receiver, and associated detection method, has a (single) tuner 11 that can be tuned away from a first frequency, from which a first broadcast signal is being received, to a second frequency to detect alternative broadcast signals (i.e., scan alternative frequencies, AF) and tuned back to the first frequency to continue receiving the first broadcast signal without interrupting the received service. This the fact that, in systems such as OFDM (e.g., DAB) systems, not all broadcast data packets (31, Figure 3) within a received frame are required to be decoded in order to receive a desired broadcast service, is utilised. The tuner is tuned away, demodulating and decoding a packet from a first received frame, detects or discovers alternative services (second broadcast signal at second frequency) and is quickly tuned back to the original frequency to continue receiving the first broadcast service from a second received frame - without any perceivable break (to the user) in the reception of the first broadcast; the first and second frames may be consecutive frames in the broadcast signal. A quality metric of the second (alternative) broadcast signal may be determined.

2. 发明公开

EP2837151A1 A METHOD OF, AND RECEIVER FOR, DETECTING A BROADCAST OFDM SIGNAL 有权
标题翻译：方法和接收器识别OFDM传输信号
公开(公告)号：EP2837151A1
公开(公告)日：2015-02-18
申请号：EP13717829.9
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04L27/26
CPC分类号： H04L27/2678 , H04L27/2663 , H04L27/2671 , H04L27/2685
摘要： The present invention provides a method and apparatus for detecting a broadcast OFDM signal. The present invention utilise the property of the OFDM symbol in that it contains highly correlated (guard interval) and highly uncorrelated (rest of the symbol) portions. The present invention checks for correlation in the guard interval and lack of correlation outside the guard interval to identify whether or not a received signal is of OFDM construction.

3. 发明公开

EP2837116A1 A RECEIVER 有权
标题翻译：接收器
公开(公告)号：EP2837116A1
公开(公告)日：2015-02-18
申请号：EP13717828.1
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04H40/18
CPC分类号： H04H20/22
摘要： A broadcast receiver, and associated detection method, has a (single) tuner 11 that can be tuned away from a first frequency, from which a first broadcast signal is being received, to a second frequency to detect alternative broadcast signals (i.e., scan alternative frequencies, AF) and tuned back to the first frequency to continue receiving the first broadcast signal without interrupting the received service. This the fact that, in systems such as OFDM (e.g., DAB) systems, not all broadcast data packets (31, Figure 3) within a received frame are required to be decoded in order to receive a desired broadcast service, is utilised. The tuner is tuned away, demodulating and decoding a packet from a first received frame, detects or discovers alternative services (second broadcast signal at second frequency) and is quickly tuned back to the original frequency to continue receiving the first broadcast service from a second received frame - without any perceivable break (to the user) in the reception of the first broadcast; the first and second frames may be consecutive frames in the broadcast signal. A quality metric of the second (alternative) broadcast signal may be determined.

4. 发明授权

EP2837151B1 A METHOD OF, AND RECEIVER FOR, DETECTING A BROADCAST OFDM SIGNAL 有权
公开(公告)号：EP2837151B1
公开(公告)日：2019-06-19
申请号：EP13717829.9
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04L27/26

5. 发明授权

EP2837125B1 OFDM SIGNAL TO NOISE RATIO DETECTOR AND METHOD 有权
公开(公告)号：EP2837125B1
公开(公告)日：2020-01-08
申请号：EP13717830.7
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04L1/20 , H04L27/26

6. 发明公开

EP2837125A1 OFDM SIGNAL TO NOISE RATIO DETECTOR AND METHOD 有权
标题翻译：探测器的OFDM信号信噪比和方法
公开(公告)号：EP2837125A1
公开(公告)日：2015-02-18
申请号：EP13717830.7
申请日：2013-04-10
申请人： Frontier Silicon Limited
发明人： TANG-RICHARDSON, Mel , EMERSON, Christopher Michael
IPC分类号： H04L1/20 , H04L27/26
摘要： A method and apparatus for estimating the signal to noise ratio of a broadcast Orthogonal Frequency Division Multiplex (OFDM) signal is described. Received signals of the data in a guard interval and the corresponding part of the data frame of an OFDM symbol, which were identical when transmitted but which may differ when received due to noise in the channel, are compared. A sum and difference operation is then performed on the data in the compared signals to enable a Signal-to-Noise Ratio to be estimated. Sliding correlation to identify a peak and phase correction are also involved. The OFDM signal may be a DAB (Digital Audio Broadcasting) ensemble. The SNR estimation method described may be performed quickly using only two symbols worth of data and without the receiver having to lock on to the OFDM signal.

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