Estimation of Symmetric Channels for Discrete Cosine Transform Type-I Multicarrier Systems: A Compressed Sensing Approach

Figure 4

(a), (c), and (e) Estimated channel’s impulse response for SNR = 0 dB, SNR = 10 dB, and SNR = 20 dB, respectively. (b), (d), and (f) Estimated channel’s frequency response for SNR = 0 dB, SNR = 10 dB, and SNR = 20 dB, respectively. In all cases the length of the channel is , the length of the DCT1 is , and pilot subcarriers are used in the transmitter.

(a)

(b)

(c)

(d)

(e)

(f)