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For further iterations, the FF filter is fed by the channel output and the channel estimator output.

v is the coefficient of the FF filter, where w is the coefficient of the FB filter.

As shown in Figure 2, DDFE structure mainly consists of 3 linear transversal filters: the feed forward (FF) filter, and two feedback filters (FB), a channel interleaver, deinterleaver, and two delay components.

If we define the whitening filter B H =Δ-1L-H, the FF filter is the product of the matched and whitening filters, i.e., W MMSEDF=B H H H. The overall response of the FF filter and the channel is W MMSE DF H = L - n T N 0 Δ - 1 L - H. (17) Figure 3 MIMO analog JSCC system with decision feedback detection.

The FF filter is obtained from the Cholesky factorization of H H H + n T N 0 I n T = L H Δ L, where L is an n T ×n T lower triangular matrix and Δ is an n T ×n T diagonal matrix.

During the initializing period, the coefficients of the FF filter at the first iteration are estimated from the training sequence by the LMS criterion due to the fact that the hard decision of the decoder does not exist at the first iteration.

Features: frame-based 16 frequency-filtered (FF) log filter-bank energies with their first time derivatives.

The contribution of the paper is twofold: (1) systematic methods are proposed for designing FF H∞ filters for Roesser models; (2) an improved strategy has been presented to deal with the robust H∞ filter design for Roesser models.

This paper investigates the problem of robust finite frequency (FF) H∞ filtering for two-dimensional (2-D) Roesser models with polytopic uncertainties.

By the parameter-dependent idea and the generalized Kalman Yakubovich Popov lemma for 2-D Roesser models, the existence conditions of robust FF H∞ filters are obtained in terms of solving an optimization problem, which is more general than the existing results.

Subject-specific puff profiles selected for use in this study were taken from smoking sessions conducted only with high-tar GPC Full Flavor (FF) king-size filter hard-pack (15.2 mg tar, 0.97 mg nicotine, 0% filter ventilation per cigarette) and low-tar GPC Ultra Light (UL) king-size filter soft-pack (5.8 mg tar, 0.51 mg nicotine, 51.5% filter ventilation per cigarette) cigarettes.