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EXISTING SYSTEM

PROPOSED SYSTEM

EXISTING CONCEPT:

·         The principal ideas in these works lie in the identification of the Grassmann manifold as the quantization space, the establishment of the relation between the chordal distance metric with an upper bound on capacity loss, the generation and use of random code books and estimation of the tradeoff between rate loss and the feedback rate

·         Problem here is to quantify the distortion in the feedback information and obtain a bound on its impact on the achievable rate of the system relative to its perfect CSIT counterpart.

PROPOSED CONCEPT:

·         We analyze under a general quantized covariance framework, the capacity achieving strategy as well as the strategy that is rate-optimal under the STPC and their rank reduced versions by mapping these problems into one that involves quantization of positive semi-definite matrices with appropriate rank and trace equality and inequality constraints. The ergodic capacity is analyzed and the achievable rates under finite rate feedback bounded relative to the ideal CSIT limits.

TECHNIQUE :

·         Random code books generation.

TECHNIQUE :

      Tradeoff Between Capacity Loss and Feedback Rate

         Space-Only Water Filling

TECHNIQUE DEFINITION:

·         The ability to generate pseudorandom numbers is important for simulating events, estimating probabilities and other quantities, making randomized assignments or selections, and numerically testing symbolic results.

TECHNIQUE DEFINITION:

·         We focus on the problem of approaching for limited through sup-optimal pre-coding strategies. By forcing the STPC one gets a reduction in the dimension of the quantization manifold.

DRAWBACKS:

·         Transmitter via a limited number of bits per channel realization.

ADVANTAGES:

·         Transmitter via a more number of bits per channel realization.