Method and device for detecting signal
A signal detection and signal technology, applied in the field of communication, can solve the problem of no signal threshold, etc., to achieve the effect of ensuring accuracy and improving accuracy
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Embodiment 1
[0016] Embodiment 1. A signal detection method, such as figure 1 shown, including:
[0017] A1. Receive channel signal.
[0018] A valid signal may or may not be transmitted on the communication channel at a certain moment, and the channel signal received when no valid signal is transmitted is just noise. In this embodiment, at least part of the digital information carried by the effective signal transmitted by the channel is a "first bit sequence" with a set bit polarity rule.
[0019] The so-called bit polarity rule refers to the change rule of the binary digital information representing the bit, for example: the bit polarity of the contained bits is all the same, the bit polarity of adjacent bits is opposite, the bit polarity of the Mth bit is the same as that of the Nth bit (M, N are natural numbers) the bit polarities are opposite (or the same), etc., all can be regarded as the so-called "set bit polarity rule". Obviously, a group of bits constrained by a bit polarity ...
Embodiment 2
[0034] Embodiment 2. This embodiment gives an example of the signal detection of the HS-SICH of TD-SCDMA using the method of Embodiment 1, such as figure 2 shown, including:
[0035] B1. Receive HS-SICH channel signals.
[0036] According to the data characteristics of HS-SICH, its effective signal carries three special bit sequences, which are ACK / NACK (hereinafter abbreviated as ACK) bit sequence of 36-fold repetition coding, RMF bit sequence of 16-fold repetition coding, 2-fold repetition coding Repeatedly coded TPC bit sequences, these three bit sequences can be regarded as three subsequences in the "first bit sequence", obviously, in this case, the "set bit polarity rule" is, the bits contained in each subsequence The bit polarities of the subsequences are the same, of course, the bit polarities of the subsequences may be the same or different.
[0037] B2. Demodulate the received HS-SICH channel signal to obtain bit-level digital information.
[0038] For the sake of...
Embodiment 3
[0054] Embodiment 3. This embodiment gives another example of the method in Embodiment 1 being used for signal detection of HS-SICH of TD-SCDMA, such as image 3 shown, including:
[0055] C1. Receive the HS-SICH channel signal.
[0056] C2. Demodulate the received HS-SICH channel signal to obtain bit-level digital information.
[0057] C3. Use the demodulated ACK bit sequence, RMF bit sequence and TPC bit sequence to obtain the bit noise σ positively correlated with the noise component 2 .
[0058] Steps C1-C3 are similar to steps B1-B3 in Embodiment 2, and will not be repeated here.
[0059] C4. Use the demodulated ACK bit sequence to obtain the signal decision value Sig positively correlated with the signal component.
[0060] In this embodiment, the "second detection sequence" used to obtain the signal decision value only corresponds to a subsequence in the "first bit sequence". Of course, in actual use, another subsequence may also be selected, such as the demodulate...
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