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Table 1 Spectral norm of m×N frames with m=32:16:96 and N=128 obtained with Algorithm 3 and Algorithm 4

From: Approximate equiangular tight frames for compressed sensing and CDMA applications

m dimension Spectral norm   
  Algorithm 3 Algorithm 4 Optimal
32 2.074 2.015 2.000
48 1.716 1.655 1.633
64 1.499 1.440 1.414
80 1.351 1.288 1.265
96 1.250 1.171 1.155