The author, maxfiner, graduated from Xi'an University of Electronic Science and Technology with a master's degree in signal and information processing. Maxfiner has worked in the wireless communication department of Huawei Communication Technology Co., Ltd., and has many years of experience in engineering project development. It also has algorithm theory research, simulation verification, and corresponding hardware design implementation capabilities. It has practical experience in all aspects of communication physical layer development and design. .
Convolution is a basic concept of signal processing. One of the most important aspects of its implementation is perhaps the following sentence: The convolution of the time domain corresponds to the multiplication of the frequency domain. In this sentence, or in other words, this concept will be fully reflected in many applications, such as frequency domain equalization, such as channel estimation, such as filtering analysis. The convolution formula, at first glance, seems a bit awkward. Why is it such a form, why is one of the signals to be flipped?
Through the above derivation, and then experience and observe the convolution formula, perhaps there is no such unintuitive feeling.
The next issue - proficient in signal processing design small TIps (7): related to a wide range of applications, so stay tuned!
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Proficient in Signal Processing Design Small TIps(1): Signals and Information
Proficient in signal processing design, small TIps (2): the role of mathematics
Proficient in signal processing design, small TIps (3): the three cornerstones that must be mastered
Proficient in signal processing design Small Tips(4): Several signals that are most frequently used
Proficient in Signal Processing Design Small Tips(5): Three widely used mathematical concepts
LAN WDM - LAN Wavelength Division Multiplex
LWDM is a wavelength division multiplexing Lan-WDM technology based on Ethernet channels. Its channel interval is 200~800GHz, this range is between DWDM (100GHz, 50GHz) and CWDM (about 3THz). LWDM uses 12 wavelengths in the O-band (1260nm~1360nm) range from 1269nm to 1332nm, with a wavelength interval of 4nm (1269.23, 1273.54, 1277.89, 1282.26, 1286.66, 1291.1, 1295.56, 1300.05, 1304.58, 1309.14, 1313.73 , 1318.35nm).
The characteristic of LWDM working wavelength is that it is located near zero dispersion, with small dispersion and good stability. At the same time, LWDM can support 12-wave 25G, the capacity is increased, and the optical fiber can be further saved.
Channel 1: Wavelength 1313.73nm, reuse the DML-1310 wavelength in 100G CWDM applications. Starting from this wavelength, the channel spacing of the wavelengths is about 4.5nm;
Channel 2: Wavelength 1309.14nm, which reuses the DML wavelength in 100G LanWDM applications;
Channel 3: Wavelength 1304.58nm, reuse the DML wavelength in 100G LanWDM application;
Channel 4: Wavelength 1300.05nm, reuse the DML wavelength in 100G LanWDM applications;
Channel 5: Wavelength 1295.56nm, which reuses the DML wavelength in 100G LanWDM applications;
Channel 6: Wavelength 1291.10nm, reuse the DML-1290 wavelength in 100G CWDM applications;
Channel 7: wavelength 1286.66nm, reuse the EML wavelength in 400G LanWDM applications;
Channel 8: wavelength 1282.26nm, reuse the EML wavelength in 400G LanWDM applications;
Channel 9: The wavelength is 1277.89nm, which reuses the EML wavelength in 400G LanWDM applications;
Channel 10: wavelength 1273.54nm, reuse the EML wavelength in 400G LanWDM applications;
Channel 11: The wavelength is 1269.23nm, which reuses the DML-1270 wavelength in 100G CWDM applications.
LAN WDM Splitter, LAN WDM
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