# US 9,438,287 B2 · Apparatus and method for mitigating loss of signal content > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,287 B2 - Document ID: US9438287B2 - Status: Granted - Kind: B2 - Application number: 14/562,499 - Filed: 2014-12-05 - Published: 2016-06-09 - Granted: 2016-09-06 - Earliest claimed: 2014-12-05 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Ravi H. Motwani - Web page: https://patentgrep.com/patent/US9438287B2 ## CPC - H04B 1/1036: {with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters (H04B1/123 takes precedence; filter circuits H03H)} - H04B 1/0475: {with means for limiting noise, interference or distortion (H04B1/0483 takes precedence)} - H04B 1/10: Means associated with receiver for limiting or suppressing noise or interference - H04B 2001/1063: {using a notch filter} - H04L 25/085: {Arrangements for reducing interference in line transmission systems, e.g. by differential transmission} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Described is an apparatus comprising: a first sampler to oversample a signal, the signal being processed for transmission through a channel having a notch region; a bandpass filter with passband response to filter the oversampled signal in the notch region; and a first modulator to translate the filtered signal to a higher frequency band than a frequency band of the notch region. Described is a method performed by a transmitter, the method comprising: oversampling a signal; and translating, in response to the oversampling, signal content in a notch region of a channel to a frequency band which is higher than a frequency band of the notch region. ## Claims ### Claim 1 An apparatus comprising: a first sampler to oversample a signal, the signal to be processed for transmission through a channel having a notch region; a bandpass filter, with passband response, to filter the oversampled signal in the notch region; and a first modulator to translate the filtered signal to a higher frequency band than a frequency band of the notch region. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the bandpass filter is implemented as a filter bank. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the filter bank is to decompose the oversampled signal into multiple sub-band sections, and wherein the filtered signal is one of the decomposed signals in one of the sub-band sections. ### Claim 4 (depends on 1) The apparatus of claim 1 comprises a transmitter to transmit the translated filtered signal and the oversampled signal through the channel to a receiver, wherein the channel has a notch associated with the notch region. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the receiver comprises a second modulator to modulate the translated filtered signal, received by the receiver, to a lower frequency band, wherein the lower frequency band is the frequency band of the notch region. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the receiver comprises a reconstruction filter bank to combine the modulated filtered signal, generated by the second modulator, with the received oversampled signal which suffered notch degradation. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the receiver comprises a down sampler to restore the oversampled signal to a frequency of the signal sampled by the first sampler. ### Claim 8 A method performed by a transmitter, the method comprising: oversampling a signal; and translating, in response to the oversampling, at least a portion of the oversampled signal content in a notch region of a wired channel to a frequency band which is higher than a frequency band of the notch region. ### Claim 9 (depends on 8) The method of claim 8 comprising: transmitting the oversampled signal and the translated signal content over the wired channel to a receiver. ### Claim 10 (depends on 9) The method of claim 9, wherein the receiver is to modulate the translated signal content from the higher frequency band to a lower frequency band corresponding to the frequency band of the notch region. ### Claim 11 (depends on 10) The method of claim 10, wherein the receiver is to combine the translated signal content, which is modulated to the lower frequency band, with the received oversampled signal which suffered notch degradation. ### Claim 12 A system comprising: a channel having a notch region; a first Integrated Circuit (IC); and a second IC coupled to the first IC via the channel, the second IC including a transmitter which comprises: a first sampler to oversample a signal, the signal to be processed for transmission through the channel; a bandpass filter, with passband response, to filter the oversampled signal in the notch region of the channel; a first modulator to translate the filtered signal to a higher frequency band than a frequency band of the notch region; and a driver to transmit the translated filtered signal and the oversampled signal to the first IC. ### Claim 13 (depends on 12) The system of claim 12 comprises an I/O interface which is to allow communication with another processor. ### Claim 14 (depends on 13) The system of claim 13, wherein the I/O interface is a Serial Advanced Technology Attachment (SATA) interface. ### Claim 15 (depends on 12) The system of claim 12, wherein the first IC is a memory controller and the second IC is a non-volatile memory. ### Claim 16 (depends on 15) The system of claim 15, wherein the non-volatile memory is at least one of: NAND flash memory, NOR flash memory, a Phase Change Memory (PCM), a three dimensional cross point memory, a resistive memory, nanowire memory, a ferro-electric transistor random access memory (FeTRAM), a magnetoresistive random access memory (MRAM) memory that incorporates memristor technology, or a spin transfer torque (STT)-MRAM. ### Claim 17 (depends on 12) The system of claim 12, wherein the first IC is a non-volatile memory and the second IC is a memory controller. ### Claim 18 (depends on 17) The system of claim 17, wherein the non-volatile memory is at least one of: a NAND flash memory, a NOR flash memory, a Phase Change Memory (PCM), a three dimensional cross point memory, a resistive memory, nanowire memory, a ferro-electric transistor random access memory (FeTRAM), a magnetoresistive random access memory (MRAM) memory that incorporates memristor technology, or a spin transfer torque (STT)-MRAM. ### Claim 19 (depends on 12) The system of claim 12, wherein the channel is an Open NAND Flash Interface (ONFI) compliant channel. ### Claim 20 (depends on 12) The system of claim 12 comprises a wireless interface which is to allow the first or second IC to wirelessly communicate with another device. ### Claim 21 An apparatus comprising: a filter to receive a signal on a first frequency band over a channel having a notch region, and to provide a filtered signal; and a modulator coupled to the filter, the modulator is to modulate the filtered signal to a second frequency band, where the second frequency band is lower in frequency than the first frequency band, and where the second frequency band is a frequency band of the notch region of the channel. ### Claim 22 (depends on 21) The apparatus of claim 21 comprises a reconstruction filter bank to combine the modulated filtered signal with the received signal, the reconstruction filter bank to generate a reconstructed signal. ### Claim 23 (depends on 22) The apparatus of claim 22 comprises a down sampler to down sample the reconstructed signal to restore the received signal to a frequency of a signal sampled by a sampler of a transmitter. ### Claim 24 (depends on 21) The apparatus of claim 21, wherein the filter has a passband response.