Transmission method and device for positioning pilot signal
A technology of a pilot signal and a transmission method, applied in the field of communication, can solve the problems of reducing positioning accuracy, a small number of pilots, affecting pilot signal measurement, etc., to achieve the effects of reducing interference and improving accuracy
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] Figure 4 A method for generating a positioning pilot pattern provided by an embodiment of the present invention. use Figure 4 The positioning pilot pattern generated by the shown method can be allocated to each cell for use in a communication system using OFDM. Such as Figure 4 As shown, the method for generating a positioning pilot pattern includes:
[0031] Step 401, generating at least two different initial frequency hopping sequences according to a preset pilot interval.
[0032] In this step, different frequency hopping sequences can be generated according to the preset pilot interval. The frequency hopping sequence may be a Costas sequence, a Latin sequence, a linear congruential sequence, and the like. The method for generating a frequency hopping sequence according to a preset pilot interval has many implementation methods in the prior art, which will not be repeated here.
[0033] Step 402, generate a combined frequency hopping sequence according to th...
Embodiment 2
[0043] In this embodiment, the positioning pilots are set to have an interval of M=6 subcarriers in the frequency domain, and different initial frequency hopping sequences, such as Costas sequences, Latin sequences, and linear congruential sequences, can be generated according to the intervals. These generated initial frequency hopping sequences all meet the requirements of multi-cell pilots, that is, the number of overlaps between the generated pilot patterns and their shifted patterns in the time-frequency domain is small. Since M=6, the generated positioning pilot pattern is a 6×6 two-dimensional time-frequency pattern, so the number of positioning pilot patterns obtained after the frequency offset of the positioning pilot pattern in the time domain and the frequency domain is the largest for M 2 =36. Then, different initial frequency hopping sequences are combined to obtain a 6×12 two-dimensional time-frequency pattern. In order to comply with the limitation of the lengt...
example 1
[0045] Example 1: According to the positioning pilot in the frequency domain interval M=6 subcarriers can generate two such as Figure 5a with Figure 5b The Costas sequence shown (the black unit block in the figure represents the positioning pilot signal). Then, will be as Figure 5a The Costas sequence {0, 5, 2, 1, 3, 4} shown is the same as Figure 5b The combination of the Costas sequence {0, 4, 2, 5, 1, 3} shown can result in a sequence {0, 5, 2, 1, 3, 4'0, 4, 2, 5, 1 of length 12 , 3}, thus forming a 6×12 pattern. In order to comply with the limitation of 10 OFDM symbol length, the 6×12 pattern is truncated (for example, remove Figure 5b The last two columns of ), the resulting positioning pilot pattern is shown in Figure 5c.
[0046] Then, examine the SDA (Side-lobe Distribution Array) of the pattern shown in Figure 5c, and judge The number of coincidences between the generated pilot pattern and its shifted pattern in the time-frequency domain. The SDAs of the p...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More