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以3为1 mod 2^k的半原根的一种新的二进制数码及乘法器

A new Binary Number Code and a Multiplier, based on 3 as semi-primitive root of 1 mod 2^k

N. F. Benschop

摘要:

3的幂产生模2^k(k>2)的奇数剩余的一半,并且改变符号产生另一半。换句话说:3是1 mod 2^k(k>2)的半原根。因此,每个k位残差是n = +/-3^i.2^j mod 2^k,具有唯一的非负指数对:i<2^{k-2}且j<k。一种新的“双底对数”二进制数码(以2和3为底)利用了这一特性。这个(二进制)对数代码[s,i,j] -其中s是相应的符号,通过将其转换为2和3的指数的相加以及所涉及的符号的XOR来简化二进制乘法。- 专利US-5923888(13 jul 99)

英文摘要:

The powers of 3 generate half of the odd residues mod 2^k (k>2), and a sign change yields the other half. In other words: 3 is a semi-primitive root of 1 mod 2^k (k>2). Hence each k-bit residue is n = +/- 3^i.2^j mod 2^k, with unique non-neg exponent pair: i<2^{k-2} and j<k. -- A new "dual base logarithmic" binary number code (bases 2 and 3) employs this property. This (binary) log-code [s,i,j] - where s is the corresponding sign, simplifies binary multiplication by translating it to addition of the exponents of 2 and 3, and XOR of the signs involved. -- Patent US-5923888 (13jul99)

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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