Compară metode

	Coduri Polare cu Decodare prin Anulare Succesivă	Ortogonal Frequency Division Multiplexing (OFDM)
Domeniu	Telecomunicații	Telecomunicații
Familie	Process / pipeline	Process / pipeline
Anul apariției	2009	1971
Autorul original	Erdal Arikan	Weinstein and Ebert
Tip	recursive error-correcting code	multicarrier modulation scheme
Sursa seminală	Arikan, E. (2009). Channel polarization: A method for constructing capacity-achieving codes for symmetric binary-input memoryless channels. IEEE Transactions on Information Theory, 55(7), 3051-3073.	Weinstein, S. B., & Ebert, P. M. (1971). Data transmission by frequency-division multiplexing using the discrete Fourier transform. IEEE Transactions on Communication Technology, 19(5), 628-634.
Denumiri alternative	channel polarization, recursive codes	multicarrier modulation
Înrudite	5	5
Rezumat	Polar codes, introduced by Erdal Arikan in 2009, are the first constructive family of codes proven to achieve the Shannon capacity of symmetric binary-input memoryless channels. They use recursive construction and successive cancellation decoding, a simple greedy algorithm with theoretical guarantees. Polar codes were adopted in 5G NR for control channel coding and are studied for future 6G systems. Unlike turbo and LDPC codes (which are empirical), polar codes provide rigorous theoretical foundations.	OFDM is a multicarrier modulation technique that divides a wideband channel into many narrowband orthogonal subcarriers. Introduced by Weinstein and Ebert in 1971, it exploits the duality between time and frequency domains to efficiently use spectrum while mitigating intersymbol interference in frequency-selective channels. OFDM is now the standard for high-speed wireless systems including WiFi, cellular LTE, and digital broadcasting.