Motorola Corporation

Fabrice Aidan

Yoram Salant

Leonid Tsukerman

Mark Elnekave

Noam Sivan

Gregory Leshin

A method and apparatus for implementing a linearly approximated Log MAP algorithm, the implementation involves calculating MAX*(a(n),b(n)) function, the method having the steps of: (A) Receiving a(n), b(n) and a value DE; (B) calculating (a(n)&plus;b(n)&plus;DE/2 and generating at least one intermediate result, the at least one intermediate result reflecting at least one relationship between at least two elements out of a(n), b(n) and DE; and (C) providing an MAX*(a(n),b(n)) result selected from a group comprising of a(n), b(n) or (a(n)&plus;b(n)&plus;DE)/2, the selection dependent upon the at least one intermediate result.

Apparatus and method for implementing a linearly approximated log map algorithm

A method and a device for performing stack operations within a processing system. A first and second stack pointers point to a top of a stack and to a memory location following the top of the stack. A first stack pointer is used during pop operations and a second stack pointer is used during push operations. When a stack pointer is selected, it replaces the other stack pointer. The selected memory pointer is provided to a memory module in which a stack is implemented, and is also updated. When a pop operation is executed the updated stack pointer points to a memory location preceding a memory location pointed by the selected stack pointer and when a push operation is executed the updated stack pointer points to a memory address following that address.

Device and a method for performing stack operations in a processing system

A power saving device and method for either adding or subtracting a constant from an operand, by checking a logic value of a portion of the operand and deciding whether to activate a multi-bit adder or to perform the subtraction or addition by inverting a portion of the operand. The power saving device and method is especially efficient when the constant K equals 2 . Then, the n'th bit of the operand is checked and if the addition or subtraction operation can be performed by inverting the n'th bit of the operand, a result is generated by that inversion, while a multi-bit adder is disabled.

Growing community of inventors

Raanana, Israel

Fabrice Aidan