Why is it so difficult for people in the computer field to learn wireless communication?
The difference in technical terminology , the lack of expertise in communication principles and digital signal processing are certainly very important aspects.
However, more importantly, this process involves many leaps in the field of thinking , and this natural barrier between different fields of thinking is the real barrier for people in the computer field to learn the field of wireless communication. After crossing this hurdle, it suddenly became clear.
Therefore, in the early stage of learning new domain knowledge and skills, the original knowledge system is actually a hindrance. It limits a person's way of thinking to the original domain, and this restriction will greatly restrict a person from learning new The degree and speed of domain knowledge.
But once it breaks through the original thinking framework and the barriers in between, and enters a brand-new field, it is suddenly enlightened and integrated.
When the knowledge of different fields is organically integrated, it will enter a new height! ! !
The signal processing process of the physical layer and the RF layer and the leap in the field of thinking
(1) Channel coding and interleaving: In the field of computer communications, this is the domain and expertise of computers.
(2) Modulation and demodulation: the mapping process from binary sequence to complex exponential subcarrier sequence. This is a leap from the computer field to the digital signal processing DSP field! From the computer communication field to the digital wireless communication field! Start here to enter the field of digital signal processing!
(3) Layer mapping of multi-antenna technology
(4) Spread spectrum precoding (only for uplink, optional): This is the field of digital wireless communication, in the same frequency resource, from a "single" space to a "code division" space.
(5) Precoding of multi-antenna MIMO technology: This is a leap from a "single" space to a "layered" space in the field of digital wireless communication in the same frequency resource .
(6) Radio resource mapping RE mapping: This is the field of digital wireless communication, which is a leap from the serial time domain to the parallel frequency domain .
(7) Digital beamforming: This is the same frequency resource in the field of digital wireless communication, from the "omnidirectional" space to the "beam local" space.
(8) OFDM conversion (time domain to frequency domain conversion): This is the conversion of individual frequency domain subcarrier signals to time domain signals . This is the leap from frequency domain signals to time domain signals in the field of wireless communication !
(9) RF radio frequency modulation: This is a leap from digital wireless communication to analog wireless communication in the field of wireless communication ! ! !