# HW7 - Consider other sample support values N (less than 10...

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Assignment #7 1. ( CDMA vs plain-BPSK space-only DoA estimation ) An antenna array with M = 7 elements receives 4 synchronous CDMA signals with true DoAs θ 1 = - 60 o , θ 2 = - 10 o , θ 3 = 20 o , and θ 4 = 45 o . The spreading gain is L = 15 and the users are Gold-type coded. The chip-sample SNR over the complex Gaussian noise is 10log 10 A 2 k N 0 / 2 = 4 dB for all users k = 1 , 2 , 3 , 4. You observe only N = 10 information bit periods. Perform space-only MVDR and MUSIC DoA estimation. Consider the exact same system conFguration with plain-BPSK signals. We assume that the total transmitted energy per information bit is the same as with the CDMA signals. Therefore, the bit-sample SNR over the complex Gaussian noise for the plain BPSK signals is 10log 10 LA 2 k N 0 / 2 = 4dB + 11 . 76dB, k = 1 , 2 , 3 , 4. Again, you observe only N = 10 information bit periods. Perform MVDR and MUSIC DoA estimation. Comment on your Fndings.
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Unformatted text preview: Consider other sample support values N (less than 10 or greater than 10). 2. Consider the CDMA signal model of Problem 1. Perform time-Frst-then-space processing to recover the DoA of user 4. Perform MVDR Fltering for both time and space processing operations and assume sample support N = 100. 3. Repeat Problem 2 for MVDR-M± space-time processing. 4. Load the CDMA system of Problem 1 with K = 12 Gold-type coded users with randomly generated (and Fxed) DoAs and SNR k over the real noise equal to 10dB, ∀ k = 1 , 2 , . . . , 12. Perform space-only MVDR estimation. Repeat the same study for joint space-time MVDR estimation without identities. ±inally, perform joint space-time MVDR estimation for user 8. Assume N = 2000. 69...
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## This note was uploaded on 02/27/2012 for the course EE 535 taught by Professor D.ramalingam during the Spring '12 term at SUNY Albany.

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