Multi-granule resource frequency-hopping method and its transmission method
A frequency hopping, single-particle technology, applied in transmission systems, radio transmission systems, electrical components, etc., can solve the problems of PAPR/CM increase, mutual orthogonality between users cannot be guaranteed, and violation of the original intention of single-carrier system design.
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example 1
[0080] Assuming that there are N=15 RBs in the frequency hopping range, and the maximum bandwidth requirement of users in the system is R=3RB, then construct a The Latin square of order corresponds to five frequency hopping groups with a bandwidth of 3RB, as shown below:
[0081] 0 1 2 3 4
[0082] 2 3 4 0 1
[0083] 4 0 1 2 3
[0084] 1 2 3 4 0
[0085] 3 4 0 1 2
[0086] Suppose the bandwidth requirement of user 1 is 2 RBs, that of user 2 is 3 RBs, and that of user 3 is 1 RB (the setting here is arbitrary and can be changed arbitrarily according to actual needs), then users 1 and 3 can be assigned to group 0 ,, User 2 can be assigned to Group 1. Then the parameters of each user are set as:
[0087] User 1: Occupies 2 RBs, then the basic parameters (G=0, β=0, r=2)
[0088] User 2: occupies 3 RBs, then the basic parameters (G=1, β=0, r=3)
[0089] User 3: Occupies 1 RB, then the basic parameters (G=0, β=2, r=1)
[0090] According to formula (1), it can be calculated ...
example 2
[0096] In the above example 1, M=K is chosen for convenience of explanation (because K=5 is just a prime number). In general, you should choose M>K. For example, in the above example, you can choose M=7, which is equivalent to adding two virtual user groups. After considering the virtual user groups, there are the following Latin formulas:
[0097]0 1 2 3 4 5 6
[0098] 2 3 4 5 6 0 1
[0099] 4 5 6 0 1 2 3
[0100] 6 0 1 2 3 4 5
[0101] 1 2 3 4 5 6 0
[0102] 3 4 5 6 0 1 2
[0103] 5 6 0 1 2 3 4
[0104] Among them, users 5 and 6 are virtual user groups.
[0105] After the starting position of the virtual group is determined, the starting frequency position of the users in the group can be further determined.
[0106] The above example 1 is a special case of example 2, which is aimed at the case that the frequency point is fully occupied, and example 2 can be used for all cases. For example, pre-allocate a large bandwidth to a small number of frequency hopping termina...
example 3
[0109] The difference between the frequency hopping pattern based on the Costas sequence and the frequency hopping pattern based on the Latin square is that the frequency hopping pattern based on the Costas sequence is not equally spaced in time, while the pattern based on the Latin square is equidistant.
[0110] The following example is a frequency hopping pattern based on the Costas sequence: there are 5 user groups, and the corresponding frequency hopping pattern is as follows:
[0111] 4 5 0 1 2 3
[0112] 3 4 5 0 1 2
[0113] 1 2 3 4 5 0
[0114] 5 0 1 2 3 4
[0115] 0 1 2 3 4 5
[0116] 2 3 4 5 0 1
[0117] Wherein, user 5 is a virtual user group, then,
[0118] At time 0, user groups occupy spectrum in the following order: 4 3 1 5 0 2
[0119] At time 1, user groups occupy spectrum in the following order: 5 4 2 0 1 3
[0120] After the starting position of the virtual group is determined, the starting frequency position of the users in the group can be further d...
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