A wireless receiver, comprising: a signal encoder configured to encode a plurality of received analog signals into a single encoded analog composite signal, in accordance with a spread-coding scheme operating under a first code rate; an analog-to-digital converter configured to convert the single encoded analog composite signal into a single encoded digital composite signal containing constituent digital signals; a signal reconstruction module configured to segregate the single encoded digital composite signal into a plurality of individual spectrum signals and reconstruct the plurality of individual spectrum signals into a single re-encoded digital composite signal in accordance with the coding scheme operating under a second code rate, wherein the first code rate is higher than the second code rate; and a signal decoder configured to decode the single re-encoded digital composite signal in accordance with the spread-coding scheme operating under the second code rate, and to output a plurality of digital signals, in which each digital signal in the plurality of digital signals corresponds to a respective analog signal of the plurality of received analog signals; wherein the signal reconstruction module comprises: a spectrum extractor module (216-1A, 216-1B) configured to extract a group of individual spectrum signals having positive frequency components and a group of individual spectrum signals having negative frequency components from the single encoded digital composite signal; a rate change filter module (216-2A, 216-2B) configured to change the sampling rate of the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components; a spectrum allocation module (216-3A, 216-3B) configure to perform a shifting operation on the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components in accordance with a tuning frequency; and a spectrum construction module configured to combine the group of shifted, individual spectrum signals having positive frequency components and the group of shifted, individual spectrum signals having negative frequency components. a signal encoder configured to encode a plurality of received analog signals into a single encoded analog composite signal, in accordance with a spread-coding scheme operating under a first code rate; an analog-to-digital converter configured to convert the single encoded analog composite signal into a single encoded digital composite signal containing constituent digital signals; a signal reconstruction module configured to segregate the single encoded digital composite signal into a plurality of individual spectrum signals and reconstruct the plurality of individual spectrum signals into a single re-encoded digital composite signal in accordance with the coding scheme operating under a second code rate, wherein the first code rate is higher than the second code rate; and a signal decoder configured to decode the single re-encoded digital composite signal in accordance with the spread-coding scheme operating under the second code rate, and to output a plurality of digital signals, in which each digital signal in the plurality of digital signals corresponds to a respective analog signal of the plurality of received analog signals; wherein the signal reconstruction module comprises: a spectrum extractor module (216-1A, 216-1B) configured to extract a group of individual spectrum signals having positive frequency components and a group of individual spectrum signals having negative frequency components from the single encoded digital composite signal; a rate change filter module (216-2A, 216-2B) configured to change the sampling rate of the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components; a spectrum allocation module (216-3A, 216-3B) configure to perform a shifting operation on the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components in accordance with a tuning frequency; and a spectrum construction module configured to combine the group of shifted, individual spectrum signals having positive frequency components and the group of shifted, individual spectrum signals having negative frequency components. a spectrum extractor module (216-1A, 216-1B) configured to extract a group of individual spectrum signals having positive frequency components and a group of individual spectrum signals having negative frequency components from the single encoded digital composite signal; a rate change filter module (216-2A, 216-2B) configured to change the sampling rate of the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components; a spectrum allocation module (216-3A, 216-3B) configure to perform a shifting operation on the group of individual spectrum signals having positive frequency components and the group of individual spectrum signals having negative frequency components in accordance with a tuning frequency; and a spectrum construction module configured to combine the group of shifted, individual spectrum signals having positive frequency components and the group of shifted, individual spectrum signals having negative frequency components.