Patent ID: 8311413

Claim:
A high power efficiency optical wireless transmitter comprising: an amplitude-to-array coder converting an amplitude of an electric signal input from a baseband modulator into optical source control signals so as to generate a optical output power corresponding to the electric signal; optical source driver groups driving optical sources based on the optical source control signals of the amplitude-to-array coder; and MMRS (modified mixed radix system) or MMRR (modified mixed radix system with Redundancy) optical source group driven by the optical source driver groups to generate various optical power intensities, wherein the MMRS optical source group includes n optical source groups, wherein a first optical source group of the n optical source groups includes m 1 −1 first unit optical sources, and a relative optical power intensity of the first unit optical sources is 1, wherein a second optical source group of the n optical source groups includes m 2 −1 second unit optical sources, and a relative optical power intensity of the second unit optical sources is m 1 , wherein a k-th optical source group of the n optical source groups includes m k −1 k-th unit optical sources, and a relative optical power intensity of the k-th unit optical sources is ∏ i = 1 k - 1 ⁢ ⁢ m i , wherein an n-th optical source group of the n optical source groups includes m n −1 n-th unit optical sources, and a relative optical power intensity of the n-th unit optical sources is ∏ i = 1 n - 1 ⁢ ⁢ m i , and wherein n, m 1 , m 2 , m k , and m n are arbitrary natural numbers, and the MMRS optical source group generates the optical power intensities having arbitrary integers ranging from 0 to ( ∏ i = 1 n ⁢ ⁢ m i - 1 ) by controlling on-off of the unit optical sources.