High-Resolution Microwave Imaging by Ruliang Yang Haiying Li Shiqiang Li Ping Zhang Lulu Tan Xiangwu Gao & Xueyan Kang

Author:Ruliang Yang, Haiying Li, Shiqiang Li, Ping Zhang, Lulu Tan, Xiangwu Gao & Xueyan Kang
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

(8.113)

(3)Secondary range compression and block shift

The signal of Eq. (8.106) with full frequency Scaling can be expressed as

(8.114)

Range IFFT to Eq. (8.114), the signal before the final FFT in Fig. 8.35 can be got as below:

(8.115)

Then, the secondary range compression and RCM correction can be carried out. For secondary distance compression, approximately considering , secondary range compression item is

(8.116)

Block shift phase function is

(8.117)

In Eq. (8.116), * denotes complex conjugation. After the second range compression, block RCM shifts as well as the Range FFT, by multiplying with phase correction , the signal processing in range direction is completed.

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