Intel Corporation

Silicon Hive B.v.

Intel Benelux B.v.

Ingolf Held

Paulus W F Gruijters

Marcus M G Quax

A programmable signal processing circuit has an instruction processing circuit (), which has an instruction set that comprises a demapping instruction. The instruction processing circuit () has an operand input () for receiving a complex number operand of the demapping instruction from a register file () and a result output () for writing a demapping result of the demapping instruction to the register file (). The instruction processing circuit () determines at least four bit metrics in response to the demapping instruction, each indicating a relative position of the complex number relative to respective border line in a complex plane. The instruction processing circuit () writes a combination of the at least four bit metrics together to the result output () in the demapping result.

Programmable signal processing circuit and method of demodulating via a demapping instruction

A programmable signal processing circuit is used to (de-)interleave a data stream. Data from the signal stream is stored in a data memory () and read in a different sequence. The programmable signal processing circuit is used for computing addresses, for use in said storing and/or reading. The programmable signal processing circuit has an instruction set that contains an instruction to compute the addresses from preceding addresses that have been used for said storing and/or reading. In response to the instruction the programmable signal processing circuit permutes positions of a plurality of bits from the old address operand and forms of a bit of the new address result as a logic function of a combination of bits from the old address operand. Successive addresses are formed by means of repeated execution of a program loop that contains an address update instruction for computing the addresses.

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Eindhoven, Netherlands

Ingolf Held