Mixed coordinate for point algorithms on elliptic curve over GF(2~m);

This paper analyzes the causes of error resulted from many ways, such as floating-point arithmetic, temperature, pressure measuring loop, choice of sampling cycle, so that the problems can be noticed.

To improve the floating-point arithmetic performance of Navigation Computer,and to meet the requirement of real-time performance of integrated navigation system,a navigation computer with floating-point auxiliary processor is proposed.

The hardware implementation is very difficult because of floating-point arithmetic disadvantage of complex computation and too much hardware resource consuming.

Step motor is a kind of flexible control equipment, on the other hand, DSP has high speed and floating operation capacity.

In order to solve the finite word length effect of implementing wave-front control algorithm using fixed-point arithmetic based on FPGA technology,the influence to the stability and system performance of the digital controller caused by coefficients quantization is analyzed,word length quantizing the coefficients that meet the demand of the controller is calculated.

The design has been used in the IP software core design of 32 b complex floating point operation as a module,and acquire a g.

Implementation of float number operation on CPLD/FPGA chip by VHDL;