Quasipotential equation in terms of rapidities and applications to relativistic bound-state and scattering problems
The review is devoted to an approach to the relativistic two-body problem in which a key role is played by the rapidity, the variable canonically conjugate to the relativistic relative distance. For a large class of quasipotentials, the analytic properties of the amplitude and wave function in the rapidity (energy) and orbital angular momentum are fully investigated. Several quantum-mechanical methods are generalized, giving the relativistic variable-phase method, a method for calculating the relativistic corrections, equations for the relativistic analogs of the scattering length and effective range, and a high-energy representation for the scattering amplitude, among others.
The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency and multiple channel bandwidths (1.25–20 MHz). Unfortunately, the existing WCDMA turbo interleaver does not permit an efficient high throughput implementation. That is why the 3rd Generation Partnership Project (3GPP) has proposed the quadratic polynomial permutation (QPP) interleaver to rectify this situation. In this paper, we will study the performances of QPP interleaver for LTE encoder channel for different configurations of LTE system and we study the effect of LTE channel turbo encoder for the transmission over a wireless multipath channel.