S. Zhou, G. B. Giannakis, and C. L. Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, no. 2, pp. 235-248, Feb. 2002.  Home/Search   Document Details and Download   Summary   Related Articles   Check

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip interleaved block spread code division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-interleaved block spread code-division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

....matrices C u=0 , and the block despreading matrices D u=0 . The objective is to guarantee deterministic multi user separation without knowing the channels, so that one can simplify (20) to y (i) D H (i)H (i)C (i)s (i) D H (i) w(i) 21) One such design example is provided in [23]. Our proposed UP OFDMA in Section III A fits into this general transceiver model as another example. Specifically, our (de )spreading matrices are C u (i) ##P (# (#K (# 0 ) #) D u (i) ##P (# (#K (# 0 )F H K ) 22) The diagonal matrix #P (# 0 ) in C u (i) can be viewed ....

S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip Interleaved Block Spread Code Division Multiple Access," IEEE Transactions on Communications, vol. 50, no. 2, pp. 235--248, February 2002.

....is quite limited compared to the conventional IRMA system [16] In this paper, we develop an all digital IR that relies on multistage block spreading (MS BS) operations to gain resilience to MUI and ISI. Chip interleaved block spread code division multiple access (CIBS CDMA) was developed in [18] to eliminate MUI deterministically at the receiver by parsing the information stream into blocks, on which block spreading, and chip interleaving is applied before transmission. CIBS CDMA relies on linear modulation, and is suitable for a bandwidth efficient setup. Here, we show that in ....

....with the digital equivalent channel model. Based on the signal and channel models, the MS BS IRMA schemes together with the system model in matrix vector form, are derived in Section III. Our digital transceiver designs developed in Section IV are based on a specific BS operation, which similar to [18], can be viewed as (and is implemented by) symbol spreading followed by chip interleaving. Thanks to chip interleaving and zero padding at the transmitter, mutual orthogonality between different users addresses is preserved even after multipath propagation, which enables deterministic multiuser ....

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

....and Frequency Selective Channels. I. INTRODUCTION ELYING on a Finite Impulse Response (FIR) model for frequency selective channels, several channelindependent block spreading schemes have recently been developed that preserve mutual orthogonality among users at the receiver [7] 10] 24] [27]. This orthogonality enables separation of the desired user by a simple code matched channel independent block despreading scheme that is MLoptimal under the FIR plus white Gaussian noise assumption on the channel. Moreover, each user achieves the maximum delay diversity for Gaussian distributed ....

....they only use (T, N) at the transmitter (certainly they all use (T, N,L,Q) at the receiver) and do not enable the maximum delay Doppler diversity provided by the doubly selective channel. Note that for time flat frequencyselective channels, our transceiver specializes to the transceiver of [27], whereas for time selective frequency flat channels our transceiver specializes to the transceiver of [14] The work presented in [19] finally, uses the BEM of (3) to develop channel estimation and equalization algorithms for a singleuser system. Existence: The proposed transceiver is based on ....

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S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-Interleaved BlockSpread Code Division Multiple Access," IEEE Trans. on Communications, vol. 50, no. 2, pp. 235--248, February 2002.

.... offer significant performance gains over the conventional RAKE receiver [ 1,3,4] Recently, transceiver designs have been proposed, that remove MUI deterministically regardless of the underlying multipath channels, and are applicable to both uplink and downlink operations; see the references in [9]. The comparisons among MUIfree transceivers favor the CIBS CDMA [9] and thus we focus on CIBS CDMA in this paper. Mutual orthogonality among different users codes is preserved by the CIBS design even after frequencyselective propagation, which enables deterministic MUI free reception that is ....

.... [ 1,3,4] Recently, transceiver designs have been proposed, that remove MUI deterministically regardless of the underlying multipath channels, and are applicable to both uplink and downlink operations; see the references in [9] The comparisons among MUIfree transceivers favor the CIBS CDMA [9], and thus we focus on CIBS CDMA in this paper. Mutual orthogonality among different users codes is preserved by the CIBS design even after frequencyselective propagation, which enables deterministic MUI free reception that is implemented with low complexity code matched filtering [9] However, ....

[Article contains additional citation context not shown here]

S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip interleaved block spread code division multiple access," IEEE Tramactions on Comm., vol. 50, no. 2, February 2002.

.... gains over the conventional RAKE receiver, 2] 1] 3] Recently, a so termed Chip Interleaved Block Spread (CIBS) CDMA system has been introduced, which maintains spreading code orthognnality at the receiver even after frequency selective propagation, and thus enables MUl free reception [5]. This transceiver can be used in the uplink as well as in the downlink. Focusing on the downlink, and comparing the downlink CIBS CDMA system employing an MUI free receiver with the downlink DS CDMA system employing a chip equalizer receiver, we obtain the following interesting results: ....

....the simulations. Exploiting the fact that D[i] possesses mutual orthogonality among users, the chip equalizer receiver then despreads . i] with (1 An)Dull] in order to obtain an estimate for g[i] i] IA ) D [i] i] 9) 2.2. MUI free Receiver for Downlink CIBS CDMA Using (5) we obtain from [5] that C. i] lies in the column space of D [i] after propagation through a frequency selective channel: H)C[i] D[i]h) r, where I I ) is the (K L) x (K L) lower triangular Toeplitz matrix with first column [h, 0] h, L] 0 . 0] T. Hence, we can rewrite (6) as = D[i]fx2q: i] ....

S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip interleaved block spread code division multiple access," IEEE Transaction on Communications, 2002 (to appear).

.... to the same user only depend on this user s signature code, various multi user transceivers have recently been proposed to achieve deterministic multi user separation in the presence of unknown time flat frequency selective fading, and guarantee channel irrespective symbol detectability [2] 10] [12], 4] However, all these multi user transceivers assume that the underlying channels are time invariant over the transmitted frame. In practice, this assumption does not hold true when channel time variation arises due to highmobility, carrier frequency offsets, and phase drifts. In this paper, ....

....and burst noise interference. For time flat frequency selective channels, we can set # # # and # # #, such that # # # ## # # # # ## # # and # # # ## # # # # ## # ### . This transceiver scheme corresponds to the Chip Interleaved Block Spread (CIBS) CDMA transceiver scheme of [12], if we use ## # # # # # ### ### as code vectors in [12] For time selective frequency flat channels, we can set # ##and # ##, such that # # # # # ####### ## ## # # # and # # # # # ####### ## ## # #### #.Ifwethentake# # # # # ###, we obtain # # # # # ####### ## # #### # # # ....

[Article contains additional citation context not shown here]

S. Zhou, G. B. Giannakis, and C. Le Martret. ChipInterleaved Block-Spread Code Division Multiple Access. IEEE Trans. on Commun., 2002 (to appear).

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S. Zhou, G. B. Giannakis, and C. L. Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, no. 2, pp. 235-248, Feb. 2002.

No context found.

S. Zhou, G. B. Giannakis, and C. L. Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, no. 2, pp. 235--248, Feb. 2002.

No context found.

S. Zhou, G. B. Giannakis, and C. L. Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, pp. 235--248, Feb. 2002.

No context found.

S. Zhou, G.B. Giannakis, and C. Le Martret, "Chip-Interleaved BlockSpread Code Division Multiple Access," IEEE Transactions on Communications, vol. 50, no. 2, pp. 235--248, February 2002.

No context found.

S. Zhou, G. B. Giannakis, and C. Le Martret, "Chip-interleaved blockspread code division multiple access," IEEE Trans. Commun., vol. 50, no. 2, pp. 235--248, Feb. 2002.

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