Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1997-08-15
2000-04-25
Ngo, Chuong Dinh
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
708517, 708622, G06F 700, G06F 752
Patent
active
060555564
ABSTRACT:
A system (400) alternatively performs real matrix operation in a first mode or performs complex matrix multiplication in a second mode. One input matrix (e.g., {B}) stays in a plurality of memory fields (430-k), while the other input matrix (e.g., {A}) is loaded into a plurality of registers (410-k). Parallel operating groups (405-k, 409-(k+1)) combine elements of {A} with elements of {B}. The groups (405-k, 409-(k+1)) comprise the memory fields (430-k), the registers (410-k) as well as computational units (440-k), switches (420-k) and adder units (460-k). The adder units (460-k) are configured by the switches (420-k) to operate as adders or to operate as accumulators, depending on the mode. Adders provide intermediate results and accumulators accumulate these intermediate results (e.g., Sum) to elements of the resulting matrix {C}. For complex multiplication, real (Re) and imaginary (Im) parts of matrix elements are in processed in adjacent groups. The system (400) uses logarithmic representations of the matrix elements and further comprises a log converter (490) and a plurality of inverse log converters (450-k).
REFERENCES:
patent: 4354249 (1982-10-01), King et al.
patent: 5204830 (1993-04-01), Wang et al.
patent: 5226002 (1993-07-01), Wu et al.
Barak Itzhak
Efrat Yacov
Kirschenbaum Jacob
Pan Shao-Wei
Gauger James E.
Motorola Inc.
Ngo Chuong Dinh
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